Prevent Flash from dropping focus on fullscreen change

This is basically a revert of half of this CL:
https://chromiumcodereview.appspot.com/10779023/

BUG=140366
TBR=viettrungluu@chromium.org
Review URL: https://chromiumcodereview.appspot.com/10830187

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@150162 0039d316-1c4b-4281-b951-d872f2087c98
2 files changed