Adding support for VSyncProvider to the software drawing path

BUG=

Review URL: https://codereview.chromium.org/57883007

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@233985 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 233985
Prevent "Adobe flash player storage settings..." link from showing prematurely.

R=estade@chromium.org
BUG=311049

Review URL: https://codereview.chromium.org/63823002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@233987 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 233987