[Web Intents] WebIntentsPickerController will now fetch icon for suggested extensions.

chrome/browser/ui/intents/web_intent_picker_model_observer.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_PICKER_MODEL_OBSERVER_H_
 #define CHROME_BROWSER_UI_INTENTS_WEB_INTENT_PICKER_MODEL_OBSERVER_H_
 #pragma once
 
+#include "base/string16.h"
+
 class WebIntentPickerModel;
 
 // Observer for changes to the WebIntentPickerModel.
 class WebIntentPickerModelObserver {
  public:
   virtual ~WebIntentPickerModelObserver() {}
 
   // Called when |model| has changed.
   virtual void OnModelChanged(WebIntentPickerModel* model) = 0;
 
   // Called when the favicon at |index| in |model| has changed.
   virtual void OnFaviconChanged(WebIntentPickerModel* model, size_t index) = 0;
 
+  // Called when the extension with |extension_id| has its icon changed.
+  virtual void OnExtensionIconChanged(WebIntentPickerModel* model,
+                                      const string16& extension_id) = 0;
+
   // Called when the inline disposition should be displayed for |model|.
   virtual void OnInlineDisposition(WebIntentPickerModel* model) = 0;
 };
 
 #endif  // CHROME_BROWSER_UI_INTENTS_WEB_INTENT_PICKER_MODEL_OBSERVER_H_