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

ui/compositor/layer_animator.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "ui/compositor/layer_animator.h"
 
 #include "base/debug/trace_event.h"
 #include "base/logging.h"
 #include "base/memory/scoped_ptr.h"
 #include "ui/base/animation/animation_container.h"
@@ skipping 101 matching lines @@
       LayerAnimationElement::CreateVisibilityElement(
           visibility, duration)));
 }
 
 bool LayerAnimator::GetTargetVisibility() const {
   LayerAnimationElement::TargetValue target(delegate());
   GetTargetValue(&target);
   return target.visibility;
 }
 
+void LayerAnimator::SetBrightness(float brightness) {
+  base::TimeDelta duration = GetTransitionDuration();
+  scoped_ptr<LayerAnimationElement> element(
+      LayerAnimationElement::CreateBrightnessElement(brightness, duration));
+  element->set_tween_type(tween_type_);
+  StartAnimation(new LayerAnimationSequence(element.release()));
+}
+
+float LayerAnimator::GetTargetBrightness() const {
+  LayerAnimationElement::TargetValue target(delegate());
+  GetTargetValue(&target);
+  return target.brightness;
+}
+
+void LayerAnimator::SetGrayscale(float grayscale) {
+  base::TimeDelta duration = GetTransitionDuration();
+  scoped_ptr<LayerAnimationElement> element(
+      LayerAnimationElement::CreateGrayscaleElement(grayscale, duration));
+  element->set_tween_type(tween_type_);
+  StartAnimation(new LayerAnimationSequence(element.release()));
+}
+
+float LayerAnimator::GetTargetGrayscale() const {
+  LayerAnimationElement::TargetValue target(delegate());
+  GetTargetValue(&target);
+  return target.grayscale;
+}
+
 void LayerAnimator::SetDelegate(LayerAnimationDelegate* delegate) {
   DCHECK(delegate);
   delegate_ = delegate;
 }
 
 void LayerAnimator::StartAnimation(LayerAnimationSequence* animation) {
   OnScheduled(animation);
   if (!StartSequenceImmediately(animation)) {
     // Attempt to preempt a running animation.
     switch (preemption_strategy_) {
@@ skipping 450 matching lines @@
     }
   }
   sequence->OnScheduled();
 }
 
 base::TimeDelta LayerAnimator::GetTransitionDuration() const {
   return transition_duration_;
 }
 
 }  // namespace ui