henrik.lundin 06863c9ce5 Add TimestampUnwrapper and generalize the code
BUG=webrtc:7467
CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.linux:linux_chromium_rel_ng;master.tryserver.chromium.mac:mac_chromium_rel_ng,ios-device;master.tryserver.chromium.win:win_chromium_rel_ng;master.tryserver.chromium.android:android_compile_dbg,linux_android_rel_ng

Review-Url: https://codereview.webrtc.org/2813593003
Cr-Commit-Position: refs/heads/master@{#17833}
2017-04-24 06:54:13 +00:00
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