Replace overdraw_bottom_height with top_controls_layout_height.

content/browser/renderer_host/render_widget_host_view_base.h

Index: content/browser/renderer_host/render_widget_host_view_base.h
diff --git a/content/browser/renderer_host/render_widget_host_view_base.h b/content/browser/renderer_host/render_widget_host_view_base.h
index dc3613edde1f15d4c61c3e6be9ac7ec03fdaa4e8..62daf7f3d3a9242f2b6d3d2d4803cbd092536783 100644
--- a/content/browser/renderer_host/render_widget_host_view_base.h
+++ b/content/browser/renderer_host/render_widget_host_view_base.h
@@ -119,9 +119,8 @@ class CONTENT_EXPORT RenderWidgetHostViewBase : public RenderWidgetHostView,
   // The size of the view's backing surface in non-DPI-adjusted pixels.
   virtual gfx::Size GetPhysicalBackingSize() const;
 
-  // 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).
-  virtual float GetOverdrawBottomHeight() const;
+  // The amount that the viewport size given to Blink is shrunk by the URL-bar.
+  virtual float GetTopControlsLayoutHeight() const;
 
   // Called prior to forwarding input event messages to the renderer, giving
   // the view a chance to perform in-process event filtering or processing.