<webview>: Move contentload event from content to chrome

chrome/browser/guestview/webview/webview_guest.h

 // Copyright 2013 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 CHROME_BROWSER_GUESTVIEW_WEBVIEW_WEBVIEW_GUEST_H_
 #define CHROME_BROWSER_GUESTVIEW_WEBVIEW_WEBVIEW_GUEST_H_
 
 #include "base/observer_list.h"
 #include "chrome/browser/extensions/tab_helper.h"
 #include "chrome/browser/guestview/guestview.h"
+#include "content/public/browser/notification_registrar.h"
 #include "content/public/browser/web_contents_observer.h"
 
 namespace extensions {
 class ScriptExecutor;
 }  // namespace extensions
 
 // A WebViewGuest is a WebContentsObserver on the guest WebContents of a
 // <webview> tag. It provides the browser-side implementation of the <webview>
 // API and manages the lifetime of <webview> extension events. WebViewGuest is
 // created on attachment. That is, when a guest WebContents is associated with
 // a particular embedder WebContents. This happens on either initial navigation
 // or through the use of the New Window API, when a new window is attached to
 // a particular <webview>.
 class WebViewGuest : public GuestView,
+                     public content::NotificationObserver,
                      public content::WebContentsObserver {
  public:
   explicit WebViewGuest(content::WebContents* guest_web_contents);
 
   static WebViewGuest* From(int embedder_process_id, int instance_id);
 
   // GuestView implementation.
   virtual void Attach(content::WebContents* embedder_web_contents,
                       const std::string& extension_id,
                       int view_instance_id,
                       const base::DictionaryValue& args) OVERRIDE;
   virtual GuestView::Type GetViewType() const OVERRIDE;
   virtual WebViewGuest* AsWebView() OVERRIDE;
   virtual AdViewGuest* AsAdView() OVERRIDE;
 
+  // NotificationObserver implementation.
+  virtual void Observe(int type,
+                       const content::NotificationSource& source,
+                       const content::NotificationDetails& details) OVERRIDE;
+
   // If possible, navigate the guest to |relative_index| entries away from the
   // current navigation entry.
   void Go(int relative_index);
 
   extensions::ScriptExecutor* script_executor() {
     return script_executor_.get();
   }
 
  private:
   virtual ~WebViewGuest();
 
+  // WebContentsObserver implementation.
   virtual void DidCommitProvisionalLoadForFrame(
       int64 frame_id,
       bool is_main_frame,
       const GURL& url,
       content::PageTransition transition_type,
       content::RenderViewHost* render_view_host) OVERRIDE;
   virtual void DidStopLoading(
       content::RenderViewHost* render_view_host) OVERRIDE;
   virtual void WebContentsDestroyed(
       content::WebContents* web_contents) OVERRIDE;
 
+  // Called after the load handler is called in the guest's main frame.
+  void LoadHandlerCalled();
+
   void AddWebViewToExtensionRendererState();
   static void RemoveWebViewFromExtensionRendererState(
       content::WebContents* web_contents);
 
   ObserverList<extensions::TabHelper::ScriptExecutionObserver>
       script_observers_;
   scoped_ptr<extensions::ScriptExecutor> script_executor_;
 
+  content::NotificationRegistrar notification_registrar_;
+
   DISALLOW_COPY_AND_ASSIGN(WebViewGuest);
 };
 
 #endif  // CHROME_BROWSER_GUESTVIEW_WEBVIEW_WEBVIEW_GUEST_H_