Revert 246894 "Wire up AGC to the MediaStreamAudioProcessor."

It seems to have broken this test:
[----------] 1 test from AudioStreamHandlerTest
[ RUN      ] AudioStreamHandlerTest.ConsecutivePlayRequests
../../media/base/android/media_source_player_unittest.cc:1665: Failure
Expected: (first_job) != (second_job), actual: 0x766d4210 vs 0x766d4210
[  FAILED  ] MediaSourcePlayerTest.VideoConfigChangeContinuesAcrossSeek (125 ms)
[ RUN      ] MediaSourcePlayerTest.SeekToThenReleaseThenStart
[       OK ] MediaSourcePlayerTest.SeekToThenReleaseThenStart (82 ms)
[----------] 8 tests from MediaSourcePlayerTest (590 ms total)

> Wire up AGC to the MediaStreamAudioProcessor.
> 
> This CL enables the AGC in the processor based on the constraints, and also trigger SetVolume() in the capturer if the AGC tries to adjust the volume.
> 
> There are also some small changes in the MediaStreamAudioProcessor and its unittest.
> 
> BUG=264611
> TEST= content_unittest --gtest_filter="*MediaStreamAudioProcessor*"
> 
> Review URL: https://codereview.chromium.org/141513006

TBR=xians@chromium.org

Review URL: https://codereview.chromium.org/146923002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@246905 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 246905
drive: Merge ContentUpdatePerformer to EntryUpdatePerformer

Add UploadExistingFileOptions argument to JobScheduler.
Remove UPLOAD SyncType.
Merge ContentUpdatePerformer to EntryUpdatePerformer.
Pass metadata arguments to JobScheduler::UploadExistingFile().

BUG=337083
TEST=unit_tests

Review URL: https://codereview.chromium.org/145173010

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@246906 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 246906