Introduce bottom controls to CC and let it respond to scrolling

content/browser/renderer_host/render_widget_host_view_android.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 CONTENT_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_VIEW_ANDROID_H_
 #define CONTENT_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_VIEW_ANDROID_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 89 matching lines @@
   bool HasFocus() const override;
   bool IsSurfaceAvailableForCopy() const override;
   void Show() override;
   void Hide() override;
   bool IsShowing() override;
   gfx::Rect GetViewBounds() const override;
   gfx::Size GetVisibleViewportSize() const override;
   gfx::Size GetPhysicalBackingSize() const override;
   bool DoTopControlsShrinkBlinkSize() const override;
   float GetTopControlsHeight() const override;
+  float GetBottomControlsHeight() const override;
   void UpdateCursor(const WebCursor& cursor) override;
   void SetIsLoading(bool is_loading) override;
   void TextInputStateChanged(const TextInputState& params) override;
   void ImeCancelComposition() override;
   void ImeCompositionRangeChanged(
       const gfx::Range& range,
       const std::vector<gfx::Rect>& character_bounds) override;
   void FocusedNodeChanged(bool is_editable_node) override;
   void RenderProcessGone(base::TerminationStatus status,
                          int error_code) override;
@@ skipping 221 matching lines @@
   // Body background color of the underlying document.
   SkColor cached_background_color_;
 
   scoped_refptr<cc::Layer> layer_;
 
   std::unique_ptr<cc::SurfaceIdAllocator> id_allocator_;
   std::unique_ptr<cc::SurfaceFactory> surface_factory_;
   cc::SurfaceId surface_id_;
   gfx::Size current_surface_size_;
   cc::ReturnedResourceArray surface_returned_resources_;
-  gfx::Vector2dF location_bar_content_translation_;
+  float top_bar_shown_ratio_;
+  float bottom_bar_shown_ratio_;
   cc::Selection<gfx::SelectionBound> current_viewport_selection_;
 
   // The most recent texture size that was pushed to the texture layer.
   gfx::Size texture_size_in_layer_;
 
   // The output surface id of the last received frame.
   uint32_t last_output_surface_id_;
 
 
   std::queue<base::Closure> ack_callbacks_;
@@ skipping 38 matching lines @@
   gfx::Vector2dF last_scroll_offset_;
 
   base::WeakPtrFactory<RenderWidgetHostViewAndroid> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(RenderWidgetHostViewAndroid);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_VIEW_ANDROID_H_