Remove grow box rect support, browser part.

content/browser/renderer_host/render_widget_host_delegate.h

Index: content/browser/renderer_host/render_widget_host_delegate.h
diff --git a/content/browser/renderer_host/render_widget_host_delegate.h b/content/browser/renderer_host/render_widget_host_delegate.h
index 2f3a2b37023ed95cd7ad8f894bbefef6d064fd76..b63dcbb38eb301ea83335deb45968604c90a9782 100644
--- a/content/browser/renderer_host/render_widget_host_delegate.h
+++ b/content/browser/renderer_host/render_widget_host_delegate.h
@@ -173,11 +173,6 @@ class CONTENT_EXPORT RenderWidgetHostDelegate {
                                   bool last_unlocked_by_target,
                                   bool privileged) {}
 
-  // Return the rect where to display the resize corner, if any, otherwise
-  // an empty rect.
-  virtual gfx::Rect GetRootWindowResizerRect(
-      RenderWidgetHostImpl* render_widget_host) const;
-
   // Returns whether the associated tab is in fullscreen mode.
   virtual bool IsFullscreenForCurrentTab() const;