Listen for tab close notifications and cancel active speech sessions.

chrome/browser/speech/speech_input_manager.cc

 // Copyright (c) 2010 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.
 
 #include "chrome/browser/speech/speech_input_manager.h"
 
 #include <map>
 #include <string>
 
 #include "app/l10n_util.h"
@@ skipping 117 matching lines @@
   virtual ~SpeechInputManagerImpl();
 
   bool HasPendingRequest(int caller_id) const;
   SpeechInputManagerDelegate* GetDelegate(int caller_id) const;
 
   void CancelRecognitionAndInformDelegate(int caller_id);
 
   // Starts/restarts recognition for an existing request.
   void StartRecognitionForRequest(int caller_id);
 
-  SpeechInputManagerDelegate* delegate_;
   typedef std::map<int, SpeechInputRequest> SpeechRecognizerMap;
   SpeechRecognizerMap requests_;
   int recording_caller_id_;
   scoped_refptr<SpeechInputBubbleController> bubble_controller_;
   scoped_refptr<HardwareInfo> hardware_info_;
 };
 
 static ::base::LazyInstance<SpeechInputManagerImpl> g_speech_input_manager_impl(
     base::LINKER_INITIALIZED);
 
@@ skipping 182 matching lines @@
     // to the user, abort it since user has switched focus. Otherwise
     // recognition has started and keep that going so user can start speaking to
     // another element while this gets the results in parallel.
     if (recording_caller_id_ == caller_id || !requests_[caller_id].is_active) {
       CancelRecognitionAndInformDelegate(caller_id);
     }
   }
 }
 
 }  // namespace speech_input