Reland of name kDisableGestureRequirementForMediaPlayback and make it a test-only flag.

Reland of name kDisableGestureRequirementForMediaPlayback and make it a test-only flag. (patchset #1 id:1 of https://codereview.chromium.org/2851453003/ )

Reason for revert:
Reland the original patch as timvolodine and I believe it's not related to the compile failure early today. 

Original issue's description:
> Revert of Rename kDisableGestureRequirementForMediaPlayback and make it a test-only flag. (patchset #2 id:20001 of https://codereview.chromium.org/2843913003/ )
> 
> Reason for revert:
> broke clang-clankium-tot-builder crbug.com/716075
> 
> (FullscreenWebContentsActivityTest not updated)
> 
> Original issue's description:
> > Rename kDisableGestureRequirementForMediaPlayback and make it a test-only flag.
> > 
> > The flag should only be set by tests and will allow all autoplay related
> > restrictions such as autoplay policy and background playback to be
> > disabled.
> > 
> > BUG=714676
> > CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.android:android_optional_gpu_tests_rel;master.tryserver.chromium.linux:linux_optional_gpu_tests_rel;master.tryserver.chromium.mac:mac_optional_gpu_tests_rel;master.tryserver.chromium.win:win_optional_gpu_tests_rel
> > 
> > Review-Url: https://codereview.chromium.org/2843913003
> > Cr-Commit-Position: refs/heads/master@{#467692}
> > Committed: https://chromium.googlesource.com/chromium/src/+/d1f8f6ca6c8b7cdaf02150099ce6db0cfc7223f6
> 
> TBR=dalecurtis@chromium.org,jam@chromium.org,mlamouri@chromium.org
> # Skipping CQ checks because original CL landed less than 1 days ago.
> NOPRESUBMIT=true
> NOTREECHECKS=true
> NOTRY=true
> BUG=714676
> 
> Review-Url: https://codereview.chromium.org/2851453003
> Cr-Commit-Position: refs/heads/master@{#467715}
> Committed: https://chromium.googlesource.com/chromium/src/+/54e35df000303d1a3b5214db2232aa2fb5c12e3a

TBR=dalecurtis@chromium.org,jam@chromium.org,mlamouri@chromium.org,timvolodine@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=714676
Review-Url: https://codereview.chromium.org/2845973005
Cr-Commit-Position: refs/heads/master@{#467782}
Committed: https://chromium.googlesource.com/chromium/src/+/32d29a10153865441252e100a9781648b8df795b

[zmin, 2017-04-27 20:38:58]

Created Reland of name kDisableGestureRequirementForMediaPlayback and make it a
test-only flag.

[zmin, 2017-04-27 20:40:11]

The CQ bit was checked by zmin@chromium.org

[commit-bot: I haz the power, 2017-04-27 20:40:50]

CQ is trying da patch.

Follow status at:
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2017-04-27 20:48:29]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1493325611065090, "parent_rev":
"822e6b2520c585093f6fa163b7475bd4dc77dfac", "commit_rev":
"32d29a10153865441252e100a9781648b8df795b"}

[commit-bot: I haz the power, 2017-04-27 20:48:48]

Description was changed from

==========
Reland of name kDisableGestureRequirementForMediaPlayback and make it a
test-only flag. (patchset #1 id:1 of https://codereview.chromium.org/2851453003/
)

Reason for revert:
Reland the original patch as timvolodine and I believe it's not related to the
compile failure early today. 

Original issue's description:
> Revert of Rename kDisableGestureRequirementForMediaPlayback and make it a
test-only flag. (patchset #2 id:20001 of
https://codereview.chromium.org/2843913003/ )
> 
> Reason for revert:
> broke clang-clankium-tot-builder crbug.com/716075
> 
> (FullscreenWebContentsActivityTest not updated)
> 
> Original issue's description:
> > Rename kDisableGestureRequirementForMediaPlayback and make it a test-only
flag.
> > 
> > The flag should only be set by tests and will allow all autoplay related
> > restrictions such as autoplay policy and background playback to be
> > disabled.
> > 
> > BUG=714676
> >
CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.android:android_optional_gpu_tests_rel;master.tryserver.chromium.linux:linux_optional_gpu_tests_rel;master.tryserver.chromium.mac:mac_optional_gpu_tests_rel;master.tryserver.chromium.win:win_optional_gpu_tests_rel
> > 
> > Review-Url: https://codereview.chromium.org/2843913003
> > Cr-Commit-Position: refs/heads/master@{#467692}
> > Committed:
https://chromium.googlesource.com/chromium/src/+/d1f8f6ca6c8b7cdaf02150099ce6...
> 
> TBR=dalecurtis@chromium.org,jam@chromium.org,mlamouri@chromium.org
> # Skipping CQ checks because original CL landed less than 1 days ago.
> NOPRESUBMIT=true
> NOTREECHECKS=true
> NOTRY=true
> BUG=714676
> 
> Review-Url: https://codereview.chromium.org/2851453003
> Cr-Commit-Position: refs/heads/master@{#467715}
> Committed:
https://chromium.googlesource.com/chromium/src/+/54e35df000303d1a3b5214db2232...

TBR=dalecurtis@chromium.org,jam@chromium.org,mlamouri@chromium.org,timvolodin...
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=714676
==========

to

==========
Reland of name kDisableGestureRequirementForMediaPlayback and make it a
test-only flag. (patchset #1 id:1 of https://codereview.chromium.org/2851453003/
)

Reason for revert:
Reland the original patch as timvolodine and I believe it's not related to the
compile failure early today. 

Original issue's description:
> Revert of Rename kDisableGestureRequirementForMediaPlayback and make it a
test-only flag. (patchset #2 id:20001 of
https://codereview.chromium.org/2843913003/ )
> 
> Reason for revert:
> broke clang-clankium-tot-builder crbug.com/716075
> 
> (FullscreenWebContentsActivityTest not updated)
> 
> Original issue's description:
> > Rename kDisableGestureRequirementForMediaPlayback and make it a test-only
flag.
> > 
> > The flag should only be set by tests and will allow all autoplay related
> > restrictions such as autoplay policy and background playback to be
> > disabled.
> > 
> > BUG=714676
> >
CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.android:android_optional_gpu_tests_rel;master.tryserver.chromium.linux:linux_optional_gpu_tests_rel;master.tryserver.chromium.mac:mac_optional_gpu_tests_rel;master.tryserver.chromium.win:win_optional_gpu_tests_rel
> > 
> > Review-Url: https://codereview.chromium.org/2843913003
> > Cr-Commit-Position: refs/heads/master@{#467692}
> > Committed:
https://chromium.googlesource.com/chromium/src/+/d1f8f6ca6c8b7cdaf02150099ce6...
> 
> TBR=dalecurtis@chromium.org,jam@chromium.org,mlamouri@chromium.org
> # Skipping CQ checks because original CL landed less than 1 days ago.
> NOPRESUBMIT=true
> NOTREECHECKS=true
> NOTRY=true
> BUG=714676
> 
> Review-Url: https://codereview.chromium.org/2851453003
> Cr-Commit-Position: refs/heads/master@{#467715}
> Committed:
https://chromium.googlesource.com/chromium/src/+/54e35df000303d1a3b5214db2232...

TBR=dalecurtis@chromium.org,jam@chromium.org,mlamouri@chromium.org,timvolodin...
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=714676

Review-Url: https://codereview.chromium.org/2845973005
Cr-Commit-Position: refs/heads/master@{#467782}
Committed:
https://chromium.googlesource.com/chromium/src/+/32d29a10153865441252e100a978...
==========

[commit-bot: I haz the power, 2017-04-27 20:48:51]

Committed patchset #1 (id:1) as
https://chromium.googlesource.com/chromium/src/+/32d29a10153865441252e100a978...