[cc] Avoid "skip" optimizations when drawing layers that have copy requests.

1. LayerTreeHostImpl: When the root surface has no visible damage, but there are copy requests present, generate the RenderPasses.
2. DirectRenderer: Prevent using scissor rect optimization when copy requests are present in a RenderPass.

BUG=340499
TEST=Additional cc_unittests to show incorrect behaviors have been resolved.

Review URL: https://codereview.chromium.org/155613002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@249316 0039d316-1c4b-4281-b951-d872f2087c98
Add clickable flag to synced notifications.

This allows the alternate cursor to be shown where implemented
on hover, indicating that clicking the body of the notification
will produce an action.

BUG=316318

Review URL: https://codereview.chromium.org/153993006

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@249317 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 249316
SVN changes up to revision 249317