Revert 264763 "Wire up codec_delay() to MP3StreamParser and FFmp..."

Revert 264763 "Wire up codec_delay() to MP3StreamParser and FFmp..."

Possible candidate for broken media_unittests:

http://build.chromium.org/p/chromium.chromiumos/builders/Linux%20ChromiumOS%20Tests%20%28dbg%29%281%29/builds/30043/steps/media_unittests/logs/MediaSource_MP3_TimestampOffset_0

> Wire up codec_delay() to MP3StreamParser and FFmpegAudioDecoder.
> 
> Allows us to drop silent samples from the decoder after initialization
> and resets.
> 
> codec_delay() is always in frames, so I've changed all call sites to use
> frames instead of a TimeDelta.
> 
> Coincidentally also fixes an issue where not enough data was dropped from
> Vorbis buffers with negative timestamps.
> 
> BUG=360961
> TEST=new pipeline_integration_test
> 
> Review URL: https://codereview.chromium.org/239423005

TBR=dalecurtis@chromium.org

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=264803

[Ken Rockot(use gerrit already), 2014-04-18 16:13:21]

Committed patchset #1 manually as r264803.

[DaleCurtis, 2014-04-18 19:58:55]

This was not the cause of the issue, reverted here:
https://src.chromium.org/viewvc/chrome?view=rev&revision=264834

Fix for the issue under review here:

https://codereview.chromium.org/240123004/