Add a GPU rasterization hint to cc::PictureLayer

This adds a GPU rasterization hint to PictureLayer
and PictureLayerImpl. When using hybrid
rasterization (that is, when running with
--enable-gpu-rasterization), only layers with a
GPU rasterization hint are rasterized on the GPU.

BUG=329722

Review URL: https://codereview.chromium.org/192973002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@256304 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 256304
Add SharedWorkerServiceImpl::CheckWorkerDependency().

This method checks the worker dependency of renderer processes and calls IncrementWorkerRefCount and DecrementWorkerRefCount of RenderProcessHostImpl on UI thread if necessary.

BUG=327256

Review URL: https://codereview.chromium.org/187533002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@256305 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 256305