blimp: Update page load status update indicator to use first paint.

content/browser/renderer_host/render_widget_host_delegate.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_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_DELEGATE_H_
 #define CONTENT_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_DELEGATE_H_
 
 #include <stdint.h>
 
 #include <vector>
@@ skipping 163 matching lines @@
 
   // Called when the visibility of the RenderFrameProxyHost in outter
   // WebContents changes. This method is only called on an inner WebContents and
   // will eventually notify all the RenderWidgetHostViews belonging to that
   // WebContents.
   virtual void OnRenderFrameProxyVisibilityChanged(bool visible) {}
 
   // Update the renderer's cache of the screen rect of the view and window.
   virtual void SendScreenRects() {}
 
+  // Notifies that the main frame in the renderer has performed the first paint
+  // after a navigation.
+  virtual void OnFirstPaintAfterLoad(RenderWidgetHostImpl* render_widget_host) {
+  }
+
  protected:
   virtual ~RenderWidgetHostDelegate() {}
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_DELEGATE_H_