Replace overdraw_bottom_height with top_controls_layout_height.

content/renderer/render_widget.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_RENDERER_RENDER_WIDGET_H_
 #define CONTENT_RENDERER_RENDER_WIDGET_H_
 
 #include <deque>
 #include <map>
 
@@ skipping 327 matching lines @@
   // are no other active RenderWidgets.
   void WasSwappedOut();
 
   void FlushPendingInputEventAck();
   void DoDeferredClose();
   void DoDeferredSetWindowRect(const blink::WebRect& pos);
 
   // Resizes the render widget.
   void Resize(const gfx::Size& new_size,
               const gfx::Size& physical_backing_size,
-              float overdraw_bottom_height,
+              float top_controls_layout_height,
               const gfx::Size& visible_viewport_size,
               const gfx::Rect& resizer_rect,
               bool is_fullscreen,
               ResizeAck resize_ack);
   // Used to force the size of a window when running layout tests.
   void ResizeSynchronously(const gfx::Rect& new_position);
   virtual void SetScreenMetricsEmulationParameters(
       float device_scale_factor,
       const gfx::Point& root_layer_offset,
       float root_layer_scale);
@@ skipping 209 matching lines @@
   // We store the current cursor object so we can avoid spamming SetCursor
   // messages.
   WebCursor current_cursor_;
 
   // The size of the RenderWidget.
   gfx::Size size_;
 
   // The size of the view's backing surface in non-DPI-adjusted pixels.
   gfx::Size physical_backing_size_;
 
-  // The height of the physical backing surface that is overdrawn opaquely in
-  // the browser, for example by an on-screen-keyboard (in DPI-adjusted pixels).
-  float overdraw_bottom_height_;
+  // The amount that the viewport size given to Blink was shrunk by the URL-bar
+  // (always 0 on platforms where URL-bar hiding isn't supported).
+  float top_controls_layout_height_;
 
   // The size of the visible viewport in DPI-adjusted pixels.
   gfx::Size visible_viewport_size_;
 
   // The area that must be reserved for drawing the resize corner.
   gfx::Rect resizer_rect_;
 
   // Flags for the next ViewHostMsg_UpdateRect message.
   int next_paint_flags_;
 
@@ skipping 152 matching lines @@
   ui::MenuSourceType context_menu_source_type_;
   bool has_host_context_menu_location_;
   gfx::Point host_context_menu_location_;
 
   DISALLOW_COPY_AND_ASSIGN(RenderWidget);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_RENDER_WIDGET_H_