Remove rootWindowRect from WebWidgetClient and move it to WebViewClient.

content/renderer/render_widget.h

Index: content/renderer/render_widget.h
diff --git a/content/renderer/render_widget.h b/content/renderer/render_widget.h
index 5f27f7b1669dcb59cbf4382cf2726f366936334e..e468d5379e7752887cf148ce8fe76e99a66f458b 100644
--- a/content/renderer/render_widget.h
+++ b/content/renderer/render_widget.h
@@ -244,7 +244,6 @@ class CONTENT_EXPORT RenderWidget
                       blink::WebTextDirection hint) override;
   void setWindowRect(const blink::WebRect&) override;
   blink::WebRect windowResizerRect() override;
-  blink::WebRect rootWindowRect() override;
   blink::WebScreenInfo screenInfo() override;
   void resetInputMethod() override;
   void didHandleGestureEvent(const blink::WebGestureEvent& event,
@@ -360,6 +359,10 @@ class CONTENT_EXPORT RenderWidget
   // Called when the Widget has changed size as a result of an auto-resize.
   void DidAutoResize(const gfx::Size& new_size);
 
+  // Called to get the position of the root window containing the widget in
+  // screen coordinates.
+  gfx::Rect RootWindowRect();
+
   // Indicates whether this widget has focus.
   bool has_focus() const { return has_focus_; }
 
@@ -690,7 +693,7 @@ class CONTENT_EXPORT RenderWidget
   // While we are waiting for the browser to update window sizes, we track the
   // pending size temporarily.
   int pending_window_rect_count_;
-  blink::WebRect pending_window_rect_;
+  gfx::Rect pending_window_rect_;
 
   // The screen rects of the view and the window that contains it.
   gfx::Rect view_screen_rect_;