MSE: Don't force discontinuity logic on audio frame partial front trimming

MSE: Don't force discontinuity logic on audio frame partial front trimming

This change removes the signalling of a new media segment when an audio
frame is partially front-trimmed. This allows other muxed streams, like
video, to not necessarily continue with a keyframe as the next frame
processed (unless new media segment has otherwise been signalled).

BUG=408216
R=dalecurtis@chromium.org
TEST=no media_unittest or mediasource layout test regression

Committed: https://crrev.com/bad1c50973b102415b4862636c34d70c0f44335e
Cr-Commit-Position: refs/heads/master@{#294885}

[wolenetz, 2014-09-11 23:50:02]

ptal

[DaleCurtis, 2014-09-12 00:37:54]

lgtm, want to craft a unit test for it?

[wolenetz, 2014-09-15 18:35:46]

On 2014/09/12 00:37:54, DaleCurtis wrote:
> lgtm, want to craft a unit test for it?

I'll have a new PS including unit test for ToT, though that test will need
modification/removal if we merge back.

[DaleCurtis, 2014-09-15 18:39:20]

I'd just CQ this then and the test as a separate patch.

[wolenetz, 2014-09-15 19:00:26]

The CQ bit was checked by wolenetz@chromium.org

[wolenetz, 2014-09-15 19:01:12]

On 2014/09/15 18:39:20, DaleCurtis wrote:
> I'd just CQ this then and the test as a separate patch.

Ok - I'll put together the test as a separate CL for ToT soon.

[commit-bot: I haz the power, 2014-09-15 19:16:54]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patchset/559843005/1

[commit-bot: I haz the power, 2014-09-15 20:36:30]

Committed patchset #1 (id:1) as 83e19deb65559a199830f7c85b002ad0bb9d37b3

[commit-bot: I haz the power, 2014-09-15 20:40:08]

Patchset 1 (id:??) landed as
https://crrev.com/bad1c50973b102415b4862636c34d70c0f44335e
Cr-Commit-Position: refs/heads/master@{#294885}