MSE: On init segment received, set need random access point flag on all track buffers

MSE: On init segment received, set need random access point flag on all track buffers

This change updates Chromium to observe the proposed text in the W3C MSE
spec per https://www.w3.org/Bugs/Public/show_bug.cgi?id=26032.
Previously, SourceBufferStream::Append() would fail and report decode
error if the first processed (and appended to SBS) frame(s) after a
non-first init segment were not random access points.
This change drops those frames by setting the 'need random access point
flag' on all track buffers true during the initialization segment
received algorithm in SourceState::OnNewConfigs().

R=acolwell@chromium.org
TEST=shiny new test that fails (on both Legacy and new FrameProcessors) without the rest of this change applied

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=276914

[wolenetz, 2014-06-11 00:59:41]

PTAL @ PS1
This CL is rebased on https://codereview.chromium.org/324243002/ (and ideally
needs that CL to land first.)

[wolenetz, 2014-06-11 02:01:52]

On 2014/06/11 00:59:41, wolenetz wrote:
> PTAL @ PS1
> This CL is rebased on https://codereview.chromium.org/324243002/ (and ideally
> needs that CL to land first.)

It also needs https://codereview.chromium.org/321233004/ to land first. Both of
those CLs are in CQ now.

[wolenetz, 2014-06-11 16:59:20]

On 2014/06/11 02:01:52, wolenetz wrote:
> On 2014/06/11 00:59:41, wolenetz wrote:
> > PTAL @ PS1
> > This CL is rebased on https://codereview.chromium.org/324243002/ (and
ideally
> > needs that CL to land first.)
> 
> It also needs https://codereview.chromium.org/321233004/ to land first. Both
of
> those CLs are in CQ now.

Both prereq CLs have now landed. Please review PS1. Thanks!

[acolwell GONE FROM CHROMIUM, 2014-06-11 22:15:38]

lgtm

[wolenetz, 2014-06-11 22:24:23]

The CQ bit was checked by wolenetz@chromium.org

[commit-bot: I haz the power, 2014-06-11 22:25:26]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/wolenetz@chromium.org/322273003/1

[commit-bot: I haz the power, 2014-06-11 23:44:11]

FYI, CQ is re-trying this CL (attempt #1).
The failing builders are:
  ios_dbg_simulator on tryserver.chromium
(http://build.chromium.org/p/tryserver.chromium/builders/ios_dbg_simulator/bui...)
  ios_rel_device on tryserver.chromium
(http://build.chromium.org/p/tryserver.chromium/builders/ios_rel_device/builds...)
  ios_rel_device_ninja on tryserver.chromium
(http://build.chromium.org/p/tryserver.chromium/builders/ios_rel_device_ninja/...)
  mac_chromium_compile_dbg on tryserver.chromium
(http://build.chromium.org/p/tryserver.chromium/builders/mac_chromium_compile_...)
  mac_chromium_rel on tryserver.chromium
(http://build.chromium.org/p/tryserver.chromium/builders/mac_chromium_rel/buil...)
  win_chromium_compile_dbg on tryserver.chromium
(http://build.chromium.org/p/tryserver.chromium/builders/win_chromium_compile_...)
  win_chromium_rel on tryserver.chromium
(http://build.chromium.org/p/tryserver.chromium/builders/win_chromium_rel/buil...)
  win_chromium_x64_rel on tryserver.chromium
(http://build.chromium.org/p/tryserver.chromium/builders/win_chromium_x64_rel/...)
  mac_gpu on tryserver.chromium.gpu
(http://build.chromium.org/p/tryserver.chromium.gpu/builders/mac_gpu/builds/15718)
  win_gpu on tryserver.chromium.gpu
(http://build.chromium.org/p/tryserver.chromium.gpu/builders/win_gpu/builds/18851)

[commit-bot: I haz the power, 2014-06-12 00:10:27]

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

[commit-bot: I haz the power, 2014-06-12 00:10:28]

Try jobs failed on following builders:
  mac_chromium_rel on tryserver.chromium
(http://build.chromium.org/p/tryserver.chromium/builders/mac_chromium_rel/buil...)

[wolenetz, 2014-06-12 19:24:50]

The CQ bit was checked by wolenetz@chromium.org

[commit-bot: I haz the power, 2014-06-12 19:33:04]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/wolenetz@chromium.org/322273003/1

[commit-bot: I haz the power, 2014-06-13 03:58:10]

Change committed as 276914