Add a new GetInstance() method for remaining files with singleton classes under chrome/browser.

chrome/browser/speech/speech_input_dispatcher_host.h

 // 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.
 
 #ifndef CHROME_BROWSER_SPEECH_SPEECH_INPUT_DISPATCHER_HOST_H_
 #define CHROME_BROWSER_SPEECH_SPEECH_INPUT_DISPATCHER_HOST_H_
 
 #include "base/basictypes.h"
 #include "base/ref_counted.h"
 #include "base/scoped_ptr.h"
 #include "chrome/browser/speech/speech_input_manager.h"
 #include "ipc/ipc_message.h"
 
 namespace speech_input {
 
 // SpeechInputDispatcherHost is a delegate for Speech API messages used by
 // ResourceMessageFilter.
 // It's the complement of SpeechInputDispatcher (owned by RenderView).
 class SpeechInputDispatcherHost
     : public base::RefCountedThreadSafe<SpeechInputDispatcherHost>,
       public SpeechInputManager::Delegate {
  public:
+  class SpeechInputCallers;
+
   explicit SpeechInputDispatcherHost(int resource_message_filter_process_id);
 
   // SpeechInputManager::Delegate methods.
   virtual void SetRecognitionResult(int caller_id,
                                     const SpeechInputResultArray& result);
   virtual void DidCompleteRecording(int caller_id);
   virtual void DidCompleteRecognition(int caller_id);
 
   // Called to possibly handle the incoming IPC message. Returns true if
   // handled.
   bool OnMessageReceived(const IPC::Message& msg, bool* msg_was_ok);
 
   // Singleton accessor setter useful for tests.
   static void set_manager_accessor(SpeechInputManager::AccessorMethod* method) {
     manager_accessor_ = method;
   }
 
  private:
-  class SpeechInputCallers;
   friend class base::RefCountedThreadSafe<SpeechInputDispatcherHost>;
 
   virtual ~SpeechInputDispatcherHost();
   void SendMessageToRenderView(IPC::Message* message, int render_view_id);
 
   void OnStartRecognition(int render_view_id, int request_id,
                           const gfx::Rect& element_rect,
                           const std::string& language,
                           const std::string& grammar);
   void OnCancelRecognition(int render_view_id, int request_id);
   void OnStopRecording(int render_view_id, int request_id);
 
   // Returns the speech input manager to forward events to, creating one if
   // needed.
   SpeechInputManager* manager();
 
   int resource_message_filter_process_id_;
-  SpeechInputCallers* callers_;  // weak reference to a singleton.
 
   static SpeechInputManager::AccessorMethod* manager_accessor_;
 
   DISALLOW_COPY_AND_ASSIGN(SpeechInputDispatcherHost);
 };
 
 }  // namespace speech_input
 
 #endif  // CHROME_BROWSER_SPEECH_SPEECH_INPUT_DISPATCHER_HOST_H_