Implement ManifestManager to handle manifest in content/

content/renderer/render_frame_impl.h

Index: content/renderer/render_frame_impl.h
diff --git a/content/renderer/render_frame_impl.h b/content/renderer/render_frame_impl.h
index d8cdfc38ac5acee76074e93d0edfdd5f1824d294..e7b9e0e8dec89b50206d3d8e8b278b79742abde1 100644
--- a/content/renderer/render_frame_impl.h
+++ b/content/renderer/render_frame_impl.h
@@ -61,6 +61,7 @@ namespace content {
 class ChildFrameCompositingHelper;
 class ExternalPopupMenu;
 class GeolocationDispatcher;
+class ManifestManager;
 class MediaStreamDispatcher;
 class MediaStreamRendererFactory;
 class MidiDispatcher;
@@ -437,6 +438,8 @@ class CONTENT_EXPORT RenderFrameImpl
   virtual void initializeChildFrame(const blink::WebRect& frame_rect,
                                     float scale_factor);
   virtual blink::WebScreenOrientationClient* webScreenOrientationClient();
+  virtual void didChangeManifest(blink::WebLocalFrame*);
+
 
   // WebMediaPlayerDelegate implementation:
   virtual void DidPlay(blink::WebMediaPlayer* player) OVERRIDE;
@@ -726,6 +729,10 @@ class CONTENT_EXPORT RenderFrameImpl
   // initialized.
   ScreenOrientationDispatcher* screen_orientation_dispatcher_;
 
+  // The Manifest Manager handles the manifest requests from the browser
+  // process.
+  ManifestManager* manifest_manager_;
+
   // The current accessibility mode.
   AccessibilityMode accessibility_mode_;