WebAudio: record whether user gesture was available and provided.

WebAudio: record whether user gesture was available and provided.

We are looking into a more consistent audio playback on mobile and want
to see whether implementing Safari iOS behaviour in Chrome Android would
break websites.

BUG=616807
Review-Url: https://codereview.chromium.org/2031393003
Cr-Commit-Position: refs/heads/master@{#398061}
(cherry picked from commit 9eeee90e6f8d52fce0b3645f933796abc13fe891)

Committed: https://chromium.googlesource.com/chromium/src/+/cbcce37a04df2f0ca1b103827975d7b061e718bb

[mlamouri (slow - plz ping), 2016-06-07 19:44:10]

Description was changed from

==========
WebAudio: record whether user gesture was available and provided.

We are looking into a more consistent audio playback on mobile and want
to see whether implementing Safari iOS behaviour in Chrome Android would
break websites.

BUG=616807

Review-Url: https://codereview.chromium.org/2031393003
Cr-Commit-Position: refs/heads/master@{#398061}
(cherry picked from commit 9eeee90e6f8d52fce0b3645f933796abc13fe891)
==========

to

==========
WebAudio: record whether user gesture was available and provided.

We are looking into a more consistent audio playback on mobile and want
to see whether implementing Safari iOS behaviour in Chrome Android would
break websites.

BUG=616807

Review-Url: https://codereview.chromium.org/2031393003
Cr-Commit-Position: refs/heads/master@{#398061}
(cherry picked from commit 9eeee90e6f8d52fce0b3645f933796abc13fe891)

Committed:
https://chromium.googlesource.com/chromium/src/+/cbcce37a04df2f0ca1b103827975...
==========

[mlamouri (slow - plz ping), 2016-06-07 19:44:12]

Committed patchset #1 (id:1) manually as
cbcce37a04df2f0ca1b103827975d7b061e718bb (tree was closed).