Normalize top controls offset to (0, 1), Chromium-side.

cc/trees/layer_tree_host_impl.h

 // Copyright 2011 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_TREES_LAYER_TREE_HOST_IMPL_H_
 #define CC_TREES_LAYER_TREE_HOST_IMPL_H_
 
 #include <set>
 #include <string>
 #include <vector>
@@ skipping 156 matching lines @@
   void SetNeedsAnimate() override;
   bool IsCurrentlyScrollingLayerAt(const gfx::Point& viewport_point,
                                    InputHandler::ScrollInputType type) override;
   bool HaveWheelEventHandlersAt(const gfx::Point& viewport_point) override;
   bool HaveTouchEventHandlersAt(const gfx::Point& viewport_port) override;
   scoped_ptr<SwapPromiseMonitor> CreateLatencyInfoSwapPromiseMonitor(
       ui::LatencyInfo* latency) override;
   ScrollElasticityHelper* CreateScrollElasticityHelper() override;
 
   // TopControlsManagerClient implementation.
-  void SetControlsTopOffset(float offset) override;
-  float ControlsTopOffset() const override;
+  float TopControlsHeight() const override;
+  void SetCurrentTopControlsShownRatio(float offset) override;
+  float CurrentTopControlsShownRatio() const override;
   void DidChangeTopControlsPosition() override;
   bool HaveRootScrollLayer() const override;
 
+  void UpdateViewportContainerSizes();
+
   struct CC_EXPORT FrameData : public RenderPassSink {
     FrameData();
     ~FrameData() override;
     void AsValueInto(base::debug::TracedValue* value) const;
 
     std::vector<gfx::Rect> occluding_screen_space_rects;
     std::vector<gfx::Rect> non_occluding_screen_space_rects;
     std::vector<FrameTimingTracker::FrameAndRectIds> composite_events;
     RenderPassList render_passes;
     RenderPassIdHashMap render_passes_by_id;
@@ skipping 331 matching lines @@
  protected:
   LayerTreeHostImpl(
       const LayerTreeSettings& settings,
       LayerTreeHostImplClient* client,
       Proxy* proxy,
       RenderingStatsInstrumentation* rendering_stats_instrumentation,
       SharedBitmapManager* shared_bitmap_manager,
       gpu::GpuMemoryBufferManager* gpu_memory_buffer_manager,
       int id);
 
-  void UpdateViewportContainerSizes();
 
   // Virtual for testing.
   virtual void AnimateLayers(base::TimeTicks monotonic_time);
   const AnimationRegistrar::AnimationControllerMap&
       active_animation_controllers() const {
     return animation_registrar_->active_animation_controllers();
   }
 
   LayerTreeHostImplClient* client_;
   Proxy* proxy_;
@@ skipping 195 matching lines @@
   bool is_likely_to_require_a_draw_;
 
   scoped_ptr<FrameTimingTracker> frame_timing_tracker_;
 
   DISALLOW_COPY_AND_ASSIGN(LayerTreeHostImpl);
 };
 
 }  // namespace cc
 
 #endif  // CC_TREES_LAYER_TREE_HOST_IMPL_H_