cc: Disable "activate to low res" optimization

This optimization is broken on m33 and causes flashing to tabs.  Turning
off the optimization fixes the problem.  This is an intentionally small
patch meant for merging to m33 and then immediately reverting on trunk.

BUG=335289

Review URL: https://codereview.chromium.org/150403007

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@250332 0039d316-1c4b-4281-b951-d872f2087c98
Disable WindowSelectorTest.DragDropInProgress.

BUG=342528

Review URL: https://codereview.chromium.org/141243007

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@250333 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 250333