Eliminate the dependency of Profile from TtsMessageFilter.

chrome/browser/speech/extension_api/tts_engine_extension_api.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_SPEECH_EXTENSION_API_TTS_ENGINE_EXTENSION_API_H_
 #define CHROME_BROWSER_SPEECH_EXTENSION_API_TTS_ENGINE_EXTENSION_API_H_
 
 #include <vector>
 
 #include "base/memory/singleton.h"
 #include "chrome/browser/speech/tts_controller.h"
 #include "extensions/browser/extension_function.h"
 
 class Utterance;
 
 namespace base {
 class ListValue;
 }
 
+namespace content {
+class BrowserContext;
+}
+
 namespace extensions {
 class Extension;
 }
 
 namespace tts_engine_events {
 extern const char kOnSpeak[];
 extern const char kOnStop[];
 extern const char kOnPause[];
 extern const char kOnResume[];
 }
 
 // TtsEngineDelegate implementation used by TtsController.
 class TtsExtensionEngine : public TtsEngineDelegate {
  public:
   static TtsExtensionEngine* GetInstance();
 
   // Overridden from TtsEngineDelegate:
-  virtual void GetVoices(Profile* profile,
-                 std::vector<VoiceData>* out_voices) OVERRIDE;
+  virtual void GetVoices(content::BrowserContext* browser_context,
+                         std::vector<VoiceData>* out_voices) OVERRIDE;
   virtual void Speak(Utterance* utterance, const VoiceData& voice) OVERRIDE;
   virtual void Stop(Utterance* utterance) OVERRIDE;
   virtual void Pause(Utterance* utterance) OVERRIDE;
   virtual void Resume(Utterance* utterance) OVERRIDE;
-  virtual bool LoadBuiltInTtsExtension(Profile* profile) OVERRIDE;
+  virtual bool LoadBuiltInTtsExtension(
+      content::BrowserContext* browser_context) OVERRIDE;
 };
-
 // Hidden/internal extension function used to allow TTS engine extensions
 // to send events back to the client that's calling tts.speak().
 class ExtensionTtsEngineSendTtsEventFunction : public SyncExtensionFunction {
  private:
   virtual ~ExtensionTtsEngineSendTtsEventFunction() {}
   virtual bool RunSync() OVERRIDE;
   DECLARE_EXTENSION_FUNCTION("ttsEngine.sendTtsEvent", TTSENGINE_SENDTTSEVENT)
 };
 
 #endif  // CHROME_BROWSER_SPEECH_EXTENSION_API_TTS_ENGINE_EXTENSION_API_H_