[Web Intents] Display throbber when loading inline disposition.

chrome/browser/ui/intents/web_intent_inline_disposition_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 CHROME_BROWSER_UI_INTENTS_WEB_INTENT_INLINE_DISPOSITION_DELEGATE_H_
 #define CHROME_BROWSER_UI_INTENTS_WEB_INTENT_INLINE_DISPOSITION_DELEGATE_H_
 #pragma once
 
 #include "base/compiler_specific.h"
 #include "content/public/browser/web_contents_delegate.h"
 
+class WebIntentPicker;
+
 // This class is the policy delegate for the rendered page in the intents
 // inline disposition bubble.
 class WebIntentInlineDispositionDelegate : public content::WebContentsDelegate {
  public:
-  WebIntentInlineDispositionDelegate();
+  // |picker| is notified when the web contents loading state changes. Must not
+  // be NULL.
+  explicit WebIntentInlineDispositionDelegate(WebIntentPicker* picker);
   virtual ~WebIntentInlineDispositionDelegate();
 
   // WebContentsDelegate implementation.
   virtual bool IsPopupOrPanel(
       const content::WebContents* source) const OVERRIDE;
   virtual bool ShouldAddNavigationToHistory(
     const history::HistoryAddPageArgs& add_page_args,
     content::NavigationType navigation_type) OVERRIDE;
   virtual content::WebContents* OpenURLFromTab(
       content::WebContents* source,
       const content::OpenURLParams& params) OVERRIDE;
+  virtual void LoadingStateChanged(content::WebContents* source) OVERRIDE;
+
+ private:
+  // Picker to notify when loading state changes. Weak pointer.
+  WebIntentPicker* picker_;
 };
 
 #endif  // CHROME_BROWSER_UI_INTENTS_WEB_INTENT_INLINE_DISPOSITION_DELEGATE_H_