Cast: Log whether the video frame is a key frame in kVideoFrameEncoded

Cast: Log whether the video frame is a key frame in kVideoFrameEncoded
events.

Rename InsertFrameEventWithSize to InsertEncodedFrameEvent. Now it
takes an additional bool argument specifying whether the frame is key
frame.

Added an optional bool field key_frame in AggregatedFrameEvent proto.
It is only set (in EncodingEventSubscriber) if there is a
VIDEO_FRAME_ENCODED event.

Also fix k{Audio,Video}FrameEncoded event to also log encoded frame size.

BUG=359407
Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=263480

[Alpha Left Google, 2014-04-11 22:16:29]

lgtm

[Alpha Left Google, 2014-04-11 22:16:33]

The CQ bit was checked by hclam@chromium.org

[commit-bot: I haz the power, 2014-04-11 22:18:10]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/imcheng@chromium.org/228603006/20001

[commit-bot: I haz the power, 2014-04-12 00:27:35]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2014-04-12 00:27:36]

Retried try job too often on win_x64_rel for step(s) base_unittests,
chrome_elf_unittests
http://build.chromium.org/p/tryserver.chromium/buildstatus?builder=win_x64_re...

[imcheng, 2014-04-12 00:51:44]

The CQ bit was checked by imcheng@chromium.org

[commit-bot: I haz the power, 2014-04-12 00:52:37]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/imcheng@chromium.org/228603006/30001

[commit-bot: I haz the power, 2014-04-12 05:17:40]

Change committed as 263480