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
7 files changed