hbos 12f4cda086 Histograms for H264EncoderImpl/H264DecoderImpl
initialization and errors.

The stats are counts using enumeration, an instance of
H264EncoderImpl/H264DecoderImpl will report at most 1 Init
and 1 Error for its entire lifetime. This is to avoid
spamming reports if initialization or coding fails and it
retries in a loop. The Init stats will give us an idea of
usage counts for the encoder/decoder. The Error stats will
give us an idea of how many of these usages encounters some
type of problem, such as encode or decode errors.

- WebRTC.Video.H264EncoderImpl.Event:
  * kH264EncoderEventInit: Occurs at InitEncode.
  * kH264EncoderEventError: Occurs if any type of error
    occurs during initialization or encoding.
- WebRTC.Video.H264DecoderImpl.Event:
  * kH264DecoderEventInit: Occurs at InitDecode.
  * kH264DecoderEventError: Occurs if any type of error
    occurs during initialization, AVGetBuffer2 or decoding.

Chromium sibling CL:
https://codereview.chromium.org/1719273002/

BUG=chromium:500605, chromium:468365

Review URL: https://codereview.webrtc.org/1716173002

Cr-Commit-Position: refs/heads/master@{#11736}
2016-02-24 11:03:11 +00:00
..
2015-07-01 23:01:56 +00:00