Move TTS extension API to chrome/browser/speech/

chrome/browser/extensions/extension_tts_api_platform.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_API_PLATFORM_H_
-#define CHROME_BROWSER_EXTENSIONS_EXTENSION_TTS_API_PLATFORM_H_
-
-#include <string>
-
-#include "chrome/browser/extensions/extension_tts_api_controller.h"
-
-// Abstract class that defines the native platform TTS interface,
-// subclassed by specific implementations on Win, Mac, etc.
-class ExtensionTtsPlatformImpl {
- public:
-  static ExtensionTtsPlatformImpl* GetInstance();
-
-  // Returns true if this platform implementation is supported and available.
-  virtual bool PlatformImplAvailable() = 0;
-
-  // Speak the given utterance with the given parameters if possible,
-  // and return true on success. Utterance will always be nonempty.
-  // If rate, pitch, or volume are -1.0, they will be ignored.
-  //
-  // The ExtensionTtsController will only try to speak one utterance at
-  // a time. If it wants to interrupt speech, it will always call Stop
-  // before speaking again.
-  virtual bool Speak(
-      int utterance_id,
-      const std::string& utterance,
-      const std::string& lang,
-      const UtteranceContinuousParameters& params) = 0;
-
-  // Stop speaking immediately and return true on success.
-  virtual bool StopSpeaking() = 0;
-
-  // Return true if this platform implementation will fire the given event.
-  // All platform implementations must fire the TTS_EVENT_END event at a
-  // minimum.
-  virtual bool SendsEvent(TtsEventType event_type) = 0;
-
-  // Return the gender of the voice, should be either "male" or "female"
-  // if known, otherwise the empty string.
-  virtual std::string gender();
-
-  virtual std::string error();
-  virtual void clear_error();
-  virtual void set_error(const std::string& error);
-
- protected:
-  ExtensionTtsPlatformImpl() {}
-  virtual ~ExtensionTtsPlatformImpl() {}
-
-  std::string error_;
-
-  DISALLOW_COPY_AND_ASSIGN(ExtensionTtsPlatformImpl);
-};
-
-#endif  // CHROME_BROWSER_EXTENSIONS_EXTENSION_TTS_API_PLATFORM_H_