Revert 122547 - Aura: New window shadows, desktop background debug toggle

+ Shadows support different appearances for active and inactive states.
+ Shadow opacity animates on activation change.
+ ImageGrid supports changing its images, allowing us to maintain our use of a single set of shadow layers per window.
+ Press control-alt-B in a debug build to reset the desktop background to a solid color, useful with a white background for testing shadows.
+ Window shadow art assets were added in an earlier revision.

After this change lands I will delete the previous art assets, ui/resources/aura/shadow_rect_*

BUG=113075
TEST=aura_shell_unittests, added to ShadowControllerTest and ImageGridTest

Review URL: https://chromiumcodereview.appspot.com/9414028

TBR=jamescook@chromium.org
Review URL: https://chromiumcodereview.appspot.com/9355013

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@122551 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 0 insertions, 3 deletions

diff --git a/ash/wm/shadow_controller.h b/ash/wm/shadow_controller.h
index ea3862d..b1c7e7a 100644
--- a/ash/wm/shadow_controller.h
+++ b/ash/wm/shadow_controller.h
@@ -70,9 +70,6 @@ class ASH_EXPORT ShadowController : public aura::EnvObserver,
   // exists.
   Shadow* GetShadowForWindow(aura::Window* window);
 
-  // Updates the shadow style for |window| based on whether it is |active|.
-  void HandleWindowActivationChange(aura::Window* window, bool active);
-
   // Shows or hides |window|'s shadow as needed (creating the shadow if
   // necessary).
   void HandlePossibleShadowVisibilityChange(aura::Window* window);