Add |needs_resize_ack| flag to ViewMsg_Resize

content/browser/renderer_host/render_widget_host_impl.h

Index: content/browser/renderer_host/render_widget_host_impl.h
diff --git a/content/browser/renderer_host/render_widget_host_impl.h b/content/browser/renderer_host/render_widget_host_impl.h
index 7e965c738e951ab08c751a658f1ae535bb5e7e01..3516a0c194c26f72837879b405339145d5b783bb 100644
--- a/content/browser/renderer_host/render_widget_host_impl.h
+++ b/content/browser/renderer_host/render_widget_host_impl.h
@@ -564,7 +564,8 @@ class CONTENT_EXPORT RenderWidgetHostImpl
                      const gfx::Size& max_size);
 
   // Fills in the |resize_params| struct.
-  void GetResizeParams(ViewMsg_Resize_Params* resize_params);
+  // Returns |false| if the update is redundant, |true| otherwise.
+  bool GetResizeParams(ViewMsg_Resize_Params* resize_params);
 
   // Sets the |resize_params| that were sent to the renderer bundled with the
   // request to create a new RenderWidget.