Move TTS extension API to chrome/browser/speech/

chrome/browser/extensions/extension_tts_engine_api.h

-// Copyright (c) 2011 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_EXTENSIONS_EXTENSION_TTS_ENGINE_API_H_
-#define CHROME_BROWSER_EXTENSIONS_EXTENSION_TTS_ENGINE_API_H_
-
-#include "base/memory/singleton.h"
-#include "chrome/browser/extensions/extension_function.h"
-
-class Extension;
-class Utterance;
-
-namespace base {
-class ListValue;
-}
-
-// Return a list of all available voices registered by extensions.
-void GetExtensionVoices(Profile* profile, base::ListValue* result_voices);
-
-// Find the first extension with a tts_voices in its
-// manifest that matches the speech parameters of this utterance.
-// If found, store a pointer to the extension in |matching_extension| and
-// the index of the voice within the extension in |voice_index| and
-// return true.
-bool GetMatchingExtensionVoice(Utterance* utterance,
-                               const Extension** matching_extension,
-                               size_t* voice_index);
-
-// Speak the given utterance by sending an event to the given TTS engine
-// extension voice.
-void ExtensionTtsEngineSpeak(Utterance* utterance,
-                             const Extension* extension,
-                             size_t voice_index);
-
-// Stop speaking the given utterance by sending an event to the extension
-// associated with this utterance.
-void ExtensionTtsEngineStop(Utterance* utterance);
-
-// 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 RunImpl() OVERRIDE;
-  DECLARE_EXTENSION_FUNCTION_NAME("ttsEngine.sendTtsEvent")
-};
-
-#endif  // CHROME_BROWSER_EXTENSIONS_EXTENSION_TTS_ENGINE_API_H_