[Night Light] Backend ui::Layer work

ui/compositor/layer_animator.h

 // 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.
 
 #ifndef UI_COMPOSITOR_LAYER_ANIMATOR_H_
 #define UI_COMPOSITOR_LAYER_ANIMATOR_H_
 
 #include <deque>
 #include <vector>
 
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   float GetTargetBrightness() const;
 
   // Sets the grayscale on the delegate. May cause an implicit animation.
   virtual void SetGrayscale(float grayscale);
   float GetTargetGrayscale() const;
 
   // Sets the color on the delegate. May cause an implicit animation.
   virtual void SetColor(SkColor color);
   SkColor GetTargetColor() const;
 
+  // Sets the color temperature on the delegate. May cause an implicit
+  // animation.
+  virtual void SetTemperature(float temperature);
+  float GetTargetTemperature() const;
+
   // Returns the default length of animations, including adjustment for slow
   // animation mode if set.
   base::TimeDelta GetTransitionDuration() const;
 
   // Sets the layer animation delegate the animator is associated with. The
   // animator does not own the delegate. The layer animator expects a non-NULL
   // delegate for most of its operations, so do not call any methods without
   // a valid delegate installed.
   void SetDelegate(LayerAnimationDelegate* delegate);
 
@@ skipping 296 matching lines @@
   // Observers are notified when layer animations end, are scheduled or are
   // aborted.
   base::ObserverList<LayerAnimationObserver> observers_;
 
   DISALLOW_COPY_AND_ASSIGN(LayerAnimator);
 };
 
 }  // namespace ui
 
 #endif  // UI_COMPOSITOR_LAYER_ANIMATOR_H_