[Web Intents] WebIntentPickerModel uses URL instead of index to reference registered services.

chrome/browser/ui/intents/web_intent_picker_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_PICKER_DELEGATE_H_
 #define CHROME_BROWSER_UI_INTENTS_WEB_INTENT_PICKER_DELEGATE_H_
 #pragma once
 
 #include "chrome/browser/ui/intents/web_intent_picker_model.h"
 
 namespace content {
 class WebContents;
 }
 
 // A class used to notify the delegate when the user has chosen a web intent
 // service.
 class WebIntentPickerDelegate {
  public:
   typedef WebIntentPickerModel::Disposition Disposition;
 
   // Base destructor.
   virtual ~WebIntentPickerDelegate() {}
 
   // Called when the user has chosen a service.
-  virtual void OnServiceChosen(size_t index, Disposition disposition) = 0;
+  virtual void OnServiceChosen(const GURL& url, Disposition disposition) = 0;
 
   // Called when the picker has created WebContents to use for inline
   // disposition.
   virtual void OnInlineDispositionWebContentsCreated(
       content::WebContents* web_contents) = 0;
 
   // Called when the user cancels out of the dialog, whether by closing it
   // manually or otherwise purposefully.
   virtual void OnCancelled() = 0;
 
   // Called when the dialog stops showing.
   virtual void OnClosing() = 0;
 };
 
 #endif  // CHROME_BROWSER_UI_INTENTS_WEB_INTENT_PICKER_DELEGATE_H_