Enable minmizing fullscreen, except for flash fullscreen

shortcut for ash is reassigned to ctrl-m, and fullscreen flash always consumes ctrl-m and never send it back to us as unhandled, so this is no longer necessary.

BUG=131709, 286515

Review URL: https://codereview.chromium.org/35983002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@230423 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 230423
Fix crash in chrome.cast.channel.open()

BUG=310411

Review URL: https://codereview.chromium.org/36543003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@230424 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 230424