Remove RenderProcessHost notifications from the signin manager.

BUG=170921
TEST=everything still works

Review URL: https://codereview.chromium.org/126613002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@244300 0039d316-1c4b-4281-b951-d872f2087c98
Remove notifications from MediaFileSystemRegistry.

BUG=170921
TEST=everything still works

Review URL: https://codereview.chromium.org/129743003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@244301 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 244301
Include 2x assets when enable_hidpi=1 is specified on linux_aura

BUG=143619
R=erg@chromium.org

Review URL: https://codereview.chromium.org/132183004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@244302 0039d316-1c4b-4281-b951-d872f2087c98
Remove CSS Custom Filters related code in TestRunner because the feature is gone in Blink.

Review URL: https://codereview.chromium.org/132473005

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@244303 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 244303