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

cc/trees/layer_tree_host.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_H_
 #define CC_TREES_LAYER_TREE_HOST_H_
 
 #include <limits>
 #include <set>
 #include <string>
@@ skipping 196 matching lines @@
   bool has_gpu_rasterization_trigger() const {
     return has_gpu_rasterization_trigger_;
   }
   void SetHasGpuRasterizationTrigger(bool has_trigger);
   bool UseGpuRasterization() const;
   GpuRasterizationStatus GetGpuRasterizationStatus() const;
 
   void SetViewportSize(const gfx::Size& device_viewport_size);
   void SetTopControlsShrinkBlinkSize(bool shrink);
   void SetTopControlsHeight(float height);
-  void SetTopControlsContentOffset(float offset);
+  void SetTopControlsShownRatio(float ratio);
 
   gfx::Size device_viewport_size() const { return device_viewport_size_; }
 
   void ApplyPageScaleDeltaFromImplSide(float page_scale_delta);
   void SetPageScaleFactorAndLimits(float page_scale_factor,
                                    float min_page_scale_factor,
                                    float max_page_scale_factor);
   float page_scale_factor() const { return page_scale_factor_; }
   gfx::Vector2dF elastic_overscroll() const { return elastic_overscroll_; }
 
@@ skipping 183 matching lines @@
 
   base::WeakPtr<InputHandler> input_handler_weak_ptr_;
   base::WeakPtr<TopControlsManager> top_controls_manager_weak_ptr_;
 
   const LayerTreeSettings settings_;
   LayerTreeDebugState debug_state_;
 
   gfx::Size device_viewport_size_;
   bool top_controls_shrink_blink_size_;
   float top_controls_height_;
-  float top_controls_content_offset_;
+  float top_controls_shown_ratio_;
   float device_scale_factor_;
 
   bool visible_;
 
   base::OneShotTimer<LayerTreeHost> rate_limit_timer_;
 
   float page_scale_factor_;
   float min_page_scale_factor_;
   float max_page_scale_factor_;
   gfx::Vector2dF elastic_overscroll_;
@@ skipping 50 matching lines @@
 
   uint32_t surface_id_namespace_;
   uint32_t next_surface_sequence_;
 
   DISALLOW_COPY_AND_ASSIGN(LayerTreeHost);
 };
 
 }  // namespace cc
 
 #endif  // CC_TREES_LAYER_TREE_HOST_H_