Revert 244050 "This is part 1 of implemeting phantom windows for..."

This is causing PhantomWindowControllerTest.PhantomWindowShow to fail on
the Win 8 Aura bots.

> This is part 1 of implemeting phantom windows for the window controls when using --ash-enable-alternate-caption-button
> 
> Other notable changes:
> - Switched to using layer animations instead of gfx::SlideAnimation
> - Renamed PhantomWindowController::phantom_widget_ and PhantomWindowController::phantom_widget_start_ to PhantomWindowController::phantom_widget_in_target_root_ and PhantomWindowController::phantom_widget_in_start_root_ respectively.
> - Removed PhantomWindowController::Hide(). Hiding the phantom window can now only be done via destroying the PhantomWindowController
> 
> BUG=328930
> TEST=PhantomWindowControllerTest.*
> 
> Review URL: https://codereview.chromium.org/101773004

TBR=pkotwicz@chromium.org

Review URL: https://codereview.chromium.org/132183006

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@244090 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 244090