Revert 249431 "Using grayscale screenshots for GestureNav so tha..."

This change appears to create a memory leak that make the Linux ASAN bot unhappy.
http://build.chromium.org/p/chromium.memory/builders/Linux%20ASAN%20Tests%20%282%29/builds/22676/steps/content_unittests/logs/PurgeScreenshot

> Using grayscale screenshots for GestureNav so that the user can clearly tell when screenshot is shown vs. the live content.
> 
> BUG=331895
> 
> Review URL: https://codereview.chromium.org/136453009

TBR=mfomitchev@chromium.org

Review URL: https://codereview.chromium.org/156803002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@249451 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 249451
android: Migrate old content readback to use async readback (and delegated renderer)

This patch removes the use of a helper context for content readback.  Instead,
we use the async readback API.

This patch is also setting delegated renderer as the default for android.

android= https://chrome-internal-review.googlesource.com/#/c/153746/

BUG=326363
TBR=sievers@chromium.org
NOTRY=true

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=248827

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=249081

Review URL: https://codereview.chromium.org/143803004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@249453 0039d316-1c4b-4281-b951-d872f2087c98
Telemetry: allow user to specify source type for synthetic gestures.

Introduce a new command line parameter '--synthetic-gesture-source-type' to
specify a specific source type (mouse or touch) for gesture actions. This
overwrites the target platform's default source type.

BUG=335424

Review URL: https://codereview.chromium.org/134243004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@249454 0039d316-1c4b-4281-b951-d872f2087c98
net: add (*.)blacklane.com to HSTS preloaded list.

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@249455 0039d316-1c4b-4281-b951-d872f2087c98
[SyncFS] Misc trivial test updates

 * Make FakeDriveServiceHelper's output ignorable,
 * Fix test expectation errors.
 * Drop an obsolete TODO.

BUG=331988

Review URL: https://codereview.chromium.org/152793004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@249456 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 249455
SVN changes up to revision 249456