Add brightness/grayscale animations and use them for OOBE boot transition

ui/compositor/test/test_layer_animation_delegate.h

Index: ui/compositor/test/test_layer_animation_delegate.h
diff --git a/ui/compositor/test/test_layer_animation_delegate.h b/ui/compositor/test/test_layer_animation_delegate.h
index b1793e0a8db4f2b424e86d52344ef2a6751bc6ad..5d3c834964673f0b0a70682f184db4f1dced8ce6 100644
--- a/ui/compositor/test/test_layer_animation_delegate.h
+++ b/ui/compositor/test/test_layer_animation_delegate.h
@@ -23,17 +23,23 @@ class TestLayerAnimationDelegate : public LayerAnimationDelegate {
   virtual void SetTransformFromAnimation(const Transform& transform) OVERRIDE;
   virtual void SetOpacityFromAnimation(float opacity) OVERRIDE;
   virtual void SetVisibilityFromAnimation(bool visibility) OVERRIDE;
+  virtual void SetBrightnessFromAnimation(float brightness) OVERRIDE;
+  virtual void SetGrayscaleFromAnimation(float grayscale) OVERRIDE;
   virtual void ScheduleDrawForAnimation() OVERRIDE;
   virtual const gfx::Rect& GetBoundsForAnimation() const OVERRIDE;
   virtual const Transform& GetTransformForAnimation() const OVERRIDE;
   virtual float GetOpacityForAnimation() const OVERRIDE;
   virtual bool GetVisibilityForAnimation() const OVERRIDE;
+  virtual float GetBrightnessForAnimation() const OVERRIDE;
+  virtual float GetGrayscaleForAnimation() const OVERRIDE;
 
  private:
   gfx::Rect bounds_;
   Transform transform_;
   float opacity_;
   bool visibility_;
+  float brightness_;
+  float grayscale_;
 
   // Allow copy and assign.
 };