Revert 184600

Breaks omnibox text input after leaving immersive mode, will fix and reland

> ash: Use immersive mode for fullscreen
> 
> * Remove immersive mode button from maximized window frame
> * Tie immersive mode to browser-fullscreen only, keep tab-fullscreen
>   with existing UI 
> * Size button exits immersive mode
> * Add ImageButton::GetImage for testing
> 
> BUG=177549
> TEST=added to browser_tests views_unittests ash_unittests
> 
> 
> Review URL: https://chromiumcodereview.appspot.com/12316086

TBR=jamescook@chromium.org
Review URL: https://codereview.chromium.org/12335098

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@184669 0039d316-1c4b-4281-b951-d872f2087c98
22 files changed