Port identity_internals to mojo

content/public/browser/web_contents_observer.h

Index: content/public/browser/web_contents_observer.h
diff --git a/content/public/browser/web_contents_observer.h b/content/public/browser/web_contents_observer.h
index f264392a348fabf35c0ee16d0a6502ab747a775f..5ea5ef63890d3d97fa00115cb04cc01dab9158f3 100644
--- a/content/public/browser/web_contents_observer.h
+++ b/content/public/browser/web_contents_observer.h
@@ -325,6 +325,10 @@ class CONTENT_EXPORT WebContentsObserver : public IPC::Listener,
   // Invoked when theme color is changed to |theme_color|.
   virtual void DidChangeThemeColor(SkColor theme_color) {}
 
+  // Invoked when the gin bindings have run the main module on mojoized WebUI
+  // pages. Only invoked on the main frame.
+  virtual void DidRunWebUIMojoMain() {}
+
   // Invoked if an IPC message is coming from a specific RenderFrameHost.
   virtual bool OnMessageReceived(const IPC::Message& message,
                                  RenderFrameHost* render_frame_host);