472 Commits

Author SHA1 Message Date
kwiberg
087bd34d23 Move AudioDecoder and related stuff to the api/ directory
BUG=webrtc:5805, webrtc:6725

Review-Url: https://codereview.webrtc.org/2668523004
Cr-Commit-Position: refs/heads/master@{#16534}
2017-02-10 16:15:44 +00:00
ehmaldonado
b55bd5fef0 Don't capture variables explicitly in lambda expression.
As it is, the test fails to compile on some downstream compilers with the following error:

webrtc/modules/audio_coding/neteq/neteq_impl_unittest.cc:316:25: error: lambda capture 'kPayloadLength' is not required to be captured for this use [-Werror,-Wunused-lambda-capture]
      .WillOnce(Invoke([kPayloadLength, kFirstSequenceNumber, kFirstTimestamp,
                        ^
webrtc/modules/audio_coding/neteq/neteq_impl_unittest.cc:316:41: error: lambda capture 'kFirstSequenceNumber' is not required to be captured for this use [-Werror,-Wunused-lambda-capture]
      .WillOnce(Invoke([kPayloadLength, kFirstSequenceNumber, kFirstTimestamp,
                                        ^
webrtc/modules/audio_coding/neteq/neteq_impl_unittest.cc:316:63: error: lambda capture 'kFirstTimestamp' is not required to be captured for this use [-Werror,-Wunused-lambda-capture]
      .WillOnce(Invoke([kPayloadLength, kFirstSequenceNumber, kFirstTimestamp,
                                                              ^
webrtc/modules/audio_coding/neteq/neteq_impl_unittest.cc:317:25: error: lambda capture 'kFirstReceiveTime' is not required to be captured for this use [-Werror,-Wunused-lambda-capture]
                        kFirstReceiveTime](const SdpAudioFormat& format,

BUG=webrtc:7107

Review-Url: https://codereview.webrtc.org/2672823002
Cr-Commit-Position: refs/heads/master@{#16422}
2017-02-02 19:51:21 +00:00
ehmaldonado
1dffc62843 Remove all occurrences of "using std::string".
BUG=webrtc:7104
NOTRY=True

Review-Url: https://codereview.webrtc.org/2675723002
Cr-Commit-Position: refs/heads/master@{#16418}
2017-02-02 16:10:00 +00:00
michaelt
54340d8e75 Change opus min bitrate.
BUG=webrtc:7087

Review-Url: https://codereview.webrtc.org/2668693003
Cr-Commit-Position: refs/heads/master@{#16383}
2017-01-31 17:06:53 +00:00
michaelt
566d820e00 Update smoothed bitrate.
BUG=webrtc:6443

Review-Url: https://codereview.webrtc.org/2546493002
Cr-Commit-Position: refs/heads/master@{#16036}
2017-01-12 18:17:38 +00:00
ivoc
4843dd13aa Fix for left-shift of potentially negative values in NetEq.
Left shifting negative integers is undefined behavior, and should be prevented. This CL fixes one such instance in the NetEq Expand function.

BUG=chromium:677106

Review-Url: https://codereview.webrtc.org/2616363003
Cr-Commit-Position: refs/heads/master@{#15966}
2017-01-09 16:31:42 +00:00
flim
de770dd7e9 Remove AudioClassifier
BUG=webrtc:5676

Review-Url: https://codereview.webrtc.org/2615983002
Cr-Commit-Position: refs/heads/master@{#15933}
2017-01-06 17:49:47 +00:00
ossu
cafb497cc1 Limit NetEqImpl::ExtractPackets to returning one CNG packet
BUG=chromium:668834

Review-Url: https://codereview.webrtc.org/2609043002
Cr-Commit-Position: refs/heads/master@{#15868}
2017-01-02 15:00:50 +00:00
ivoc
ffecbbf5d0 Fix for integer overflow in NetEq.
BUG=chromium:668736

Review-Url: https://codereview.webrtc.org/2571483002
Cr-Commit-Position: refs/heads/master@{#15654}
2016-12-16 13:51:49 +00:00
ivoc
03392d0047 Fix for negative shift value in NetEq.
BUG=chromium:667028

Review-Url: https://codereview.webrtc.org/2562423002
Cr-Commit-Position: refs/heads/master@{#15562}
2016-12-13 09:05:37 +00:00
henrik.lundin
a9a6d4bc2c Delete voice_engine_configurations.h
The file was aldready pruned down to the point where it only included
webrtc/typedefs.h. Therefore, all includes of
voice_engine_configurations.h are replaced with typedefs.h, except on
two occasions where it was obvously not needed.

BUG=webrtc:6506

Review-Url: https://codereview.webrtc.org/2553583002
Cr-Commit-Position: refs/heads/master@{#15547}
2016-12-12 13:03:08 +00:00
ossu
f515ab8c3f Moved call.h and most of api/call/* into call/
BUG=webrtc:6716

Review-Url: https://codereview.webrtc.org/2550273003
Cr-Commit-Position: refs/heads/master@{#15460}
2016-12-07 12:53:04 +00:00
minyue
4b9a2cb0d8 Reland "Renaming AudioEncoder::SetTargetBitrate and SetProjectedPacketLossRate."
The earlier attempt of this was in
https://codereview.webrtc.org/2411613002/

It was reverted due to failures on internal bots, showing that we cannot deprecate one method.

BUG=webrtc:6303

Review-Url: https://codereview.webrtc.org/2538493006
Cr-Commit-Position: refs/heads/master@{#15333}
2016-11-30 14:50:08 +00:00
minyue
e69b46863a Revert of Renaming AudioEncoder::SetTargetBitrate and SetProjectedPacketLossRate. (patchset #5 id:240001 of https://codereview.webrtc.org/2411613002/ )
Reason for revert:
internal bot failure

Original issue's description:
> Renaming AudioEncoder::SetTargetBitrate and SetProjectedPacketLossRate.
>
> BUG=webrtc:6303
>
> Committed: https://crrev.com/84e56d576806635c966093d5421c5d04c9b90746
> Cr-Commit-Position: refs/heads/master@{#15310}

TBR=kwiberg@webrtc.org,henrik.lundin@webrtc.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=webrtc:6303

Review-Url: https://codereview.webrtc.org/2537243004
Cr-Commit-Position: refs/heads/master@{#15312}
2016-11-30 09:19:06 +00:00
minyue
84e56d5768 Renaming AudioEncoder::SetTargetBitrate and SetProjectedPacketLossRate.
BUG=webrtc:6303

Review-Url: https://codereview.webrtc.org/2411613002
Cr-Commit-Position: refs/heads/master@{#15310}
2016-11-30 08:28:07 +00:00
kwiberg
352444fcac RTC_[D]CHECK_op: Remove superfluous casts
There's no longer any need to make the two arguments have the same
signedness, so we can remove a bunch of superfluous (and sometimes
dangerous) casts.

It turned out I also had to fix the safe_cmp functions to properly handle
enums that are implicitly convertible to integers.

NOPRESUBMIT=true
BUG=webrtc:6645

Review-Url: https://codereview.webrtc.org/2534683002
Cr-Commit-Position: refs/heads/master@{#15281}
2016-11-28 23:59:03 +00:00
kwiberg
af476c737f RTC_[D]CHECK_op: Remove "u" suffix on integer constants
There's no longer any need to make the two arguments have the same
signedness, so we can drop the "u" suffix on literal integer
arguments.

NOPRESUBMIT=true
BUG=webrtc:6645

Review-Url: https://codereview.webrtc.org/2535593002
Cr-Commit-Position: refs/heads/master@{#15280}
2016-11-28 23:21:51 +00:00
solenberg
2779bab02a Support receiving DTMF for multiple RTP clock rates.
BUG=webrtc:2795

Review-Url: https://codereview.webrtc.org/2337473002
Cr-Commit-Position: refs/heads/master@{#15128}
2016-11-17 12:45:25 +00:00
Henrik Kjellander
b4af3d673a Remove all references to GYP
Remove all .gyp and .gypi files.
Remove entries from OWNERS files for *.isolate, *.gyp, *.gypi
Remove unused scripts in webrtc/build.

BUG=webrtc:6323
R=henrika@webrtc.org, phoglund@webrtc.org

Review URL: https://codereview.webrtc.org/2509703002 .

Cr-Commit-Position: refs/heads/master@{#15107}
2016-11-16 19:11:38 +00:00
henrik.lundin
79dfdadbc8 Avoid left-shifting negative values in a number of places
This is undefined behavior, according to specification.

BUG=chromium:661133

Review-Url: https://codereview.webrtc.org/2500953003
Cr-Commit-Position: refs/heads/master@{#15078}
2016-11-15 09:45:59 +00:00
henrik.lundin
80c06fa574 NetEq: Don't interpolate longer than the output size
This can happen in rare and strange cases.

Also taking the opportunity to replace all asserts with DCHECKs in
that file.

BUG=chromium:659225

Review-Url: https://codereview.webrtc.org/2499013002
Cr-Commit-Position: refs/heads/master@{#15070}
2016-11-14 16:18:56 +00:00
kwiberg
e941306bd6 NetEq: Don't forget to save the codec name
BUG=chromium:661362

Review-Url: https://codereview.webrtc.org/2472083002
Cr-Commit-Position: refs/heads/master@{#14909}
2016-11-03 12:29:12 +00:00
kwiberg
8a44e1d87b Let RTC_[D]CHECK_op accept arguments of different signedness
With this change, instead of

  RTC_DCHECK_GE(unsigned_var, 17u);

we can simply write

  RTC_DCHECK_GE(unsigned_var, 17);

or even

  RTC_DCHECK_GE(unsigned_var, -17);  // Always true.

and the mathematically sensible thing will happen.

Perhaps more importantly, we can replace checks like

  // index is size_t, num_channels is int.
  RTC_DCHECK(num_channels >= 0
             && index < static_cast<size_t>(num_channels));

or, even worse, just

  // Surely num_channels isn't negative. That would be absurd!
  RTC_DCHECK_LT(index, static_cast<size_t>(num_channels));

with simply

  RTC_DCHECK_LT(index, num_channels);

In short, you no longer have to keep track of the signedness of the arguments, because the sensible thing will happen.

BUG=webrtc:6645

Review-Url: https://codereview.webrtc.org/2459793002
Cr-Commit-Position: refs/heads/master@{#14878}
2016-11-01 19:04:32 +00:00
ossu
6b6c88f184 NetEq jitter calculation now done in uint64_t.
The timestamps are 32 bit and can (conceivably) be spaced far enough
apart for the calculation, which is done in Q4, to overflow.

BUG=chromium:653268

Review-Url: https://codereview.webrtc.org/2460393002
Cr-Commit-Position: refs/heads/master@{#14856}
2016-10-31 15:59:34 +00:00
ossu
a73f6c9726 NetEq now works with packets as values, rather than pointers.
PacketList is now list<Packet> instead of list<Packet*>.
Splicing the lists in NetEqImpl::InsertPacketInternal instead of
moving packets. Avoid moving the packet when doing Rfc3389Cng.
Removed PacketBuffer::DeleteFirstPacket and DeleteAllPackets.

BUG=chromium:657300

Review-Url: https://codereview.webrtc.org/2425223002
Cr-Commit-Position: refs/heads/master@{#14747}
2016-10-24 15:25:33 +00:00
kwiberg
b60d1962d8 Eliminate left shift of negative value by using multiplication instead
BUG=chromium:655917

Review-Url: https://codereview.webrtc.org/2430393003
Cr-Commit-Position: refs/heads/master@{#14741}
2016-10-24 11:18:50 +00:00
nisse
c4d2dc4e02 Delete DataLog abstraction, which was almost unused.
Configuration with rtc_enable_data_logging = true was broken in cl
https://codereview.webrtc.org/2054373002/ (which deleted the
FileWrapper::WriteText method), and apparently noone noticed.

BUG=None

Review-Url: https://codereview.webrtc.org/2439473002
Cr-Commit-Position: refs/heads/master@{#14719}
2016-10-21 08:53:01 +00:00
ossu
7a3776102f Removed RTPHeader from NetEq's Packet struct.
Only three items in the (rather large) header were actually used after
InsertPacket: payloadType, timestamp and sequenceNumber. They are now
put directly into Packet. This saves 129 bytes per Packet that no
longer need to be allocated and deallocated.

This also works towards decoupling NetEq from RTP. As part of that,
I've moved the NACK code earlier in InsertPacketInternal, together
with other things that directly reference the RTPHeader.

BUG=webrtc:6549

Review-Url: https://codereview.webrtc.org/2411183003
Cr-Commit-Position: refs/heads/master@{#14658}
2016-10-18 11:06:19 +00:00
henrik.lundin
0d8385770b NetEq: Convert AverageIAT from int to float calculations
With this change, the calculations inside AverageIAT are changed to be
in double-precision floating point instead of in fixed point. Also,
the method's name is changed to EstimatedClockDriftPpm to better
reflect what it returns.

A few unit tests had to be updated because of minor numerical
differences.

Also removing the UBSan suppression related to this issue.

BUG=webrtc:5889

Review-Url: https://codereview.webrtc.org/2408653002
Cr-Commit-Position: refs/heads/master@{#14628}
2016-10-13 10:35:58 +00:00
henrik.lundin
c9ec8758db NetEq: Remove special case for Merge without Expand
This was an ill tested special case which turned out to be more problem
than benefit. The special case was only triggered when the decoder frame
size was smaller than 10 ms, which is more or less unsupported by NetEq.

Also fixed a bug in a test, a bug which was exposed by the code change.

BUG=chromium:654983

Review-Url: https://codereview.webrtc.org/2412883002
Cr-Commit-Position: refs/heads/master@{#14627}
2016-10-13 09:43:38 +00:00
solenberg
99df6c03c3 Fix bug in DTMF generation where events with level > 36 would be ignored.
BUG=webrtc:2795

Review-Url: https://codereview.webrtc.org/2404183003
Cr-Commit-Position: refs/heads/master@{#14598}
2016-10-11 11:35:40 +00:00
mflodman
7056be937f Delete old video defines in engine config.
This CL deletes the old and not used video defines in
engine_configurations.h and pre-pends voice_ to indicate there are only
voice/audio defines left in the file.

BUG=none
R=solenberg@webrtc.org

Review URL: https://codereview.webrtc.org/2401673002 .

Cr-Commit-Position: refs/heads/master@{#14558}
2016-10-07 05:07:36 +00:00
henrik.lundin
58466f6d97 Relanding "Setting up an RTP input fuzzer for NetEq"
The original CL (https://codereview.webrtc.org/2315633002) was
reverted since the fuzzer depended on gflags and files in the
resources folder; neither of this is allowed for a fuzzer test in
Chromium. This new version streamlines the dependencies, and changes
the test to generate a sinusoid input audio signal instead of reading
from a file.

Original commit message:
This CL introduces a new fuzzer target neteq_rtp_fuzzer that
manipulates the RTP header fields before inserting the packets into
NetEq. A few helper classes are also introduced.

BUG=webrtc:5447
CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.win:win_chromium_rel_ng;master.tryserver.chromium.android:android_compile_dbg,linux_android_rel_ng;master.tryserver.chromium.linux:linux_chromium_rel_ng;master.tryserver.chromium.mac:mac_chromium_rel_ng,ios-device

Review-Url: https://codereview.webrtc.org/2384423002
Cr-Commit-Position: refs/heads/master@{#14523}
2016-10-05 09:27:48 +00:00
kwiberg
5adaf735dc AudioCodingModule: Specify decoders using SdpAudioFormat
NetEq already uses SdpAudioFormat internally; this CL adds an
AudioCodingModule::RegisterReceiveCodec overload that accepts
SdpAudioFormat, and propagates it through AcmReceiver into NetEq.

The intention is to get rid of the other ways to specify decoders and
always use SdpAudioFormat. (And eventually to do the same for encoders
too.)

NOTRY=true
BUG=5801

Review-Url: https://codereview.webrtc.org/2365653004
Cr-Commit-Position: refs/heads/master@{#14506}
2016-10-04 16:33:33 +00:00
ossu
9f38c218ee Cache the subtype of each DecoderInfo to make the Is* checks quicker.
Addresses a regression in the NetEq performance test.

# Added NOTRY due to android_arm64_rel being swamped.
NOTRY=True
BUG=chromium:651426

Review-Url: https://codereview.webrtc.org/2383723002
Cr-Commit-Position: refs/heads/master@{#14495}
2016-10-04 12:23:36 +00:00
skvlad
cc91d284e4 Moved RtcEventLog files from call/ to logging/
The RtcEventLog headers need to be accessible from any place which needs
logging, and the implementation needs access to data structures that are
logged.

After a discussion in the code review, we all agreed to move the RtcEventLog implementation into its own top level directory - which I called "logging/" in expectation that other types of logging may have similar requirements. The directory contains two main build targets - "rtc_event_log_api", which is just rtc_event_log.h, that has no external dependencies and can be used from anywhere, and "rtc_event_log_impl" which contains the rest of the implementation and has many dependencies (more in the future).

The "api" target can be referenced from anywhere, while the "impl" target is only needed at the place of instantiation (currently Call, soon to be moved to PeerConnection by https://codereview.webrtc.org/2353033005/).

This change allows using RtcEventLog in the p2p/ directory, so that we
can log STUN pings and ICE state transitions.

BUG=webrtc:6393
R=kjellander@webrtc.org, kwiberg@webrtc.org, solenberg@webrtc.org, stefan@webrtc.org, terelius@webrtc.org

Review URL: https://codereview.webrtc.org/2380683005 .

Cr-Commit-Position: refs/heads/master@{#14485}
2016-10-04 01:31:32 +00:00
kwiberg
ac9f876bc0 Sort #includes that got unsorted when gmock.h and gtest.h moved to webrtc/test/
gmock.h and gtest.h were moved (or rather, got wrappers so that we
could put some icky compatibility hacks in one place instead of 500)
in this CL: https://codereview.webrtc.org/2358993004/

NOPRESUBMIT=true
BUG=webrtc:6398

Review-Url: https://codereview.webrtc.org/2381013002
Cr-Commit-Position: refs/heads/master@{#14464}
2016-10-01 05:29:53 +00:00
kwiberg
77eab70470 Enable the -Wundef warning for clang
NOPRESUBMIT=true
BUG=webrtc:6398

Review-Url: https://codereview.webrtc.org/2358993004
Cr-Commit-Position: refs/heads/master@{#14425}
2016-09-29 00:42:08 +00:00
nisse
c637389949 Delete unused file mock_audio_vector.h.
BUG=webrtc:6424

Review-Url: https://codereview.webrtc.org/2367323002
Cr-Commit-Position: refs/heads/master@{#14388}
2016-09-27 06:29:57 +00:00
ossu
f1b08da5b4 Stopped using the NetEqDecoder enum internally in NetEq.
NetEqDecoder is still used in the external interfaces, but this change
opens up the ability to use SdpAudioFormats directly, once appropriate
interfaces have been added.

BUG=webrtc:5805

Review-Url: https://codereview.webrtc.org/2355503002
Cr-Commit-Position: refs/heads/master@{#14368}
2016-09-23 09:19:49 +00:00
ossu
a70695a3e1 Moved Opus-specific payload splitting into AudioDecoderOpus.
The biggest change to NetEq is the move from a primary flag, to a
Priority with two separate levels: one set by RED splitting and one
set by the codec itself. This allows us to unambigously prioritize
"fallback" packets from these two sources. I've chosen what I believe
is the sensible ordering: packets that the codec prioritizes are
chosen first, regardless of if they are secondary RED packets or
not. So if we were to use Opus w/ FEC in RED, we'd only do Opus FEC
decoding if there was no RED packet that could cover the time slot.

With this change, PayloadSplitter now only deals with RED
packets. Maybe it should be renamed RedPayloadSplitter?

BUG=webrtc:5805

Review-Url: https://codereview.webrtc.org/2342443005
Cr-Commit-Position: refs/heads/master@{#14347}
2016-09-22 09:07:03 +00:00
kwiberg
c4ccd4d61c AcmReceiver: Eliminate AcmReceiver::decoders_
BUG=webrtc:5801

Review-Url: https://codereview.webrtc.org/2351183002
Cr-Commit-Position: refs/heads/master@{#14335}
2016-09-21 17:55:21 +00:00
ossu
0d526d558b Moved codec-specific audio packet splitting into decoders.
There's still some code run specifically for Opus w/ FEC. It will be
addressed in a separate CL.

BUG=webrtc:5805

Review-Url: https://codereview.webrtc.org/2326003002
Cr-Commit-Position: refs/heads/master@{#14319}
2016-09-21 08:57:36 +00:00
henrik.lundin
42feb51f15 NetEq: New test for muted state during CNG
Verifies that NetEq doesn't enter muted state when CNG mode is active
and the packet stream is suspended for a long time.

BUG=webrtc:5608

Review-Url: https://codereview.webrtc.org/2335343011
Cr-Commit-Position: refs/heads/master@{#14308}
2016-09-20 13:51:48 +00:00
kwiberg
6b19b560ac AcmReceiver: Ask NetEq to delete all decoders at once instead of one by one
It requires a new NetEq method, but it can no longer fail. And we no
longer need to use AcmReceiver::decoders_, which we're trying to
eliminate.

(This is a re-land of https://codereview.webrtc.org/2342313002.)

BUG=webrtc:5801

Review-Url: https://codereview.webrtc.org/2348233002
Cr-Commit-Position: refs/heads/master@{#14304}
2016-09-20 11:02:38 +00:00
kwiberg
6f0f616b53 AcmReceiver: Look up last decoder in NetEq's table of decoders
AcmReceiver::decoders_ is now one step closer to being unused.

(This is a re-land of https://codereview.webrtc.org/2339953002.)

BUG=webrtc:5801

Review-Url: https://codereview.webrtc.org/2354453003
Cr-Commit-Position: refs/heads/master@{#14303}
2016-09-20 10:07:49 +00:00
ossu
61a208b1b8 Added a ParsePayload method to AudioDecoder.
It allows the decoder to split the input up into usable chunks before
they are put into NetEq's PacketBuffer. Eventually, all packet splitting
will move into ParsePayload.

There's currently a base implementation of ParsePayload. It will
generate a single Frame that calls the underlying AudioDecoder for
getting Duration() and to Decode.

BUG=webrtc:5805
BUG=chromium:428099

Review-Url: https://codereview.webrtc.org/2326953003
Cr-Commit-Position: refs/heads/master@{#14300}
2016-09-20 08:38:09 +00:00
kwiberg
7a0f2c55f5 Revert of AcmReceiver: Look up last decoder in NetEq's table of decoders (patchset #1 id:100001 of https://codereview.webrtc.org/2339953002/ )
Reason for revert:
Seems to have broken Chromium tests.

Original issue's description:
> AcmReceiver: Look up last decoder in NetEq's table of decoders
>
> AcmReceiver::decoders_ is now one step closer to being unused.
>
> BUG=webrtc:5801
>
> Committed: https://crrev.com/1e4d8b574cde64d93b98d89c7b817fb93185a307
> Cr-Commit-Position: refs/heads/master@{#14274}

TBR=ossu@webrtc.org,henrik.lundin@webrtc.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=webrtc:5801

Review-Url: https://codereview.webrtc.org/2348123002
Cr-Commit-Position: refs/heads/master@{#14279}
2016-09-18 12:35:59 +00:00
kwiberg
bfb78d1293 Revert of AcmReceiver: Ask NetEq to delete all decoders at once instead of one by one (patchset #2 id:20001 of https://codereview.webrtc.org/2342313002/ )
Reason for revert:
Seems to have broken Chromium tests.

Original issue's description:
> AcmReceiver: Ask NetEq to delete all decoders at once instead of one by one
>
> It requires a new NetEq method, but it can no longer fail. And we no
> longer need to use AcmReceiver::decoders_, which we're trying to
> eliminate.
>
> BUG=webrtc:5801
>
> Committed: https://crrev.com/f6232b43a176e1717354b671a0a52b887d70de59
> Cr-Commit-Position: refs/heads/master@{#14275}

TBR=ossu@webrtc.org,henrik.lundin@webrtc.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=webrtc:5801

Review-Url: https://codereview.webrtc.org/2349973002
Cr-Commit-Position: refs/heads/master@{#14278}
2016-09-18 12:33:48 +00:00
kwiberg
f6232b43a1 AcmReceiver: Ask NetEq to delete all decoders at once instead of one by one
It requires a new NetEq method, but it can no longer fail. And we no
longer need to use AcmReceiver::decoders_, which we're trying to
eliminate.

BUG=webrtc:5801

Review-Url: https://codereview.webrtc.org/2342313002
Cr-Commit-Position: refs/heads/master@{#14275}
2016-09-17 17:45:24 +00:00