Made Blink aware of top controls offset (Chromium-side)

cc/input/top_controls_manager.h

 // Copyright 2013 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 CC_INPUT_TOP_CONTROLS_MANAGER_H_
 #define CC_INPUT_TOP_CONTROLS_MANAGER_H_
 
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/weak_ptr.h"
 #include "cc/input/top_controls_state.h"
@@ skipping 21 matching lines @@
     HIDING_CONTROLS
   };
 
   static scoped_ptr<TopControlsManager> Create(
       TopControlsManagerClient* client,
       float top_controls_height,
       float top_controls_show_threshold,
       float top_controls_hide_threshold);
   virtual ~TopControlsManager();
 
-  float controls_top_offset() { return controls_top_offset_; }
-  float content_top_offset() {
-    return controls_top_offset_ + top_controls_height_;
-  }
+  float controls_height() { return top_controls_height_; }
+  float ControlsTopOffset();
+  float ContentTopOffset();
+
   KeyframedFloatAnimationCurve* animation() {
     return top_controls_animation_.get();
   }
   AnimationDirection animation_direction() { return animation_direction_; }
 
   void UpdateTopControlsState(TopControlsState constraints,
                               TopControlsState current,
                               bool animate);
 
   void ScrollBegin();
   gfx::Vector2dF ScrollBy(const gfx::Vector2dF& pending_delta);
   void ScrollEnd();
 
   // The caller should ensure that |Pinch{Begin,End}| are called within
   // the scope of |Scroll{Begin,End}|.
   void PinchBegin();
   void PinchEnd();
 
   gfx::Vector2dF Animate(base::TimeTicks monotonic_time);
+  void SetControlsTopOffset(float offset);
+  float top_controls_height() { return top_controls_height_; }
 
  protected:
   TopControlsManager(TopControlsManagerClient* client,
                      float top_controls_height,
                      float top_controls_show_threshold,
                      float top_controls_hide_threshold);
 
  private:
-  void SetControlsTopOffset(float offset);
   void ResetAnimations();
   void SetupAnimation(AnimationDirection direction);
   void StartAnimationIfNecessary();
   bool IsAnimationCompleteAtTime(base::TimeTicks time);
 
   TopControlsManagerClient* client_;  // The client manages the lifecycle of
                                       // this.
 
   scoped_ptr<KeyframedFloatAnimationCurve> top_controls_animation_;
   AnimationDirection animation_direction_;
@@ skipping 13 matching lines @@
   float top_controls_hide_height_;
 
   bool pinch_gesture_active_;
 
   DISALLOW_COPY_AND_ASSIGN(TopControlsManager);
 };
 
 }  // namespace cc
 
 #endif  // CC_INPUT_TOP_CONTROLS_MANAGER_H_