Route GenMailboxCHROMIUM through GpuControl

This allows the fast path to work in GLES2Implementation rather than needing
WGC3DCBI.

BUG=181120
R=sievers@chromium.org

Review URL: https://codereview.chromium.org/24714002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@226145 0039d316-1c4b-4281-b951-d872f2087c98
cc: Delete RenderSurface caching.

RenderSurface caching has been disabled for some time and getting in the way of optimizing OcclusionTracker. The proposed optimization cannot distinguish between inside and outside occlusion, which is needed by surface caching.

The proposed optimization for OcclusionTracker is here:
https://codereview.chromium.org/23708021/ 

BUG=276725

Review URL: https://codereview.chromium.org/23792012

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@226146 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 226145
SVN changes up to revision 226146
"chrome-native://" urls are now filtered from SyncedSessions.

BUG=295863

Review URL: https://codereview.chromium.org/24246014

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@226147 0039d316-1c4b-4281-b951-d872f2087c98
ChildProcessSecurityPolicy: Remove CanWriteFile and CanCreateFile.

We currently have some checks that are more fine-grained than the grants. There's no reason for this, so I'm removing them and replacing them with the broader check.

I would also like to remove some of the Can*FileSystemFile checks, but I currently cannot, as that goes into checking the permissions for the filesystem as a whole in the case of isolated file systems.

That will have to be saved for a different CL.

This CL depends on:
https://codereview.chromium.org/24406003/

This is part of Step 2 of this refactoring plan:
https://docs.google.com/a/google.com/document/d/1QGkGWuwgSuaRqovz4wyb0upqPKDVsgYOFKt44E7gmOE/edit?usp=sharing

BUG=262142, 263150

Review URL: https://codereview.chromium.org/24439002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@226148 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 226148