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

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@122547 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 1 insertions, 1 deletions

diff --git a/ash/shell/window_type_launcher.cc b/ash/shell/window_type_launcher.cc
index 0153d1c..63dde99 100644
--- a/ash/shell/window_type_launcher.cc
+++ b/ash/shell/window_type_launcher.cc
@@ -171,7 +171,7 @@ void InitWindowTypeLauncher() {
                                             gfx::Rect(120, 150, 400, 400));
   widget->GetNativeView()->SetName("WindowTypeLauncher");
   ash::internal::SetShadowType(widget->GetNativeView(),
-                               ash::internal::SHADOW_TYPE_NONE);
+                               ash::internal::SHADOW_TYPE_RECTANGULAR);
   widget->Show();
 }