Enable cloud policy for extensions by default.

This CL replaces the --enable-component-cloud-policy flag with
--disable-component-cloud-policy, so that the feature is tentatively enabled
by default for M33.

BUG=108992

Review URL: https://codereview.chromium.org/86003002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@237323 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 237323
Roll Skia DEPS to r12388

R=rmistry@google.com

Review URL: https://codereview.chromium.org/86523003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@237324 0039d316-1c4b-4281-b951-d872f2087c98
Update .DEPS.git

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@237325 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 237325