Move the code in libcros' chromeos_speech_synthesis.cc into Chrome

chrome/browser/chromeos/cros/speech_synthesis_library.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_CHROMEOS_CROS_SPEECH_SYNTHESIS_LIBRARY_H_
-#define CHROME_BROWSER_CHROMEOS_CROS_SPEECH_SYNTHESIS_LIBRARY_H_
-#pragma once
-
-#include "base/memory/singleton.h"
-
-namespace chromeos {
-
-// This interface defines the interaction with the ChromeOS login library APIs.
-class SpeechSynthesisLibrary {
- public:
-  typedef void(*InitStatusCallback)(bool success);
-
-  virtual ~SpeechSynthesisLibrary() {}
-
-  // Speaks the specified text.
-  virtual bool Speak(const char* text) = 0;
-
-  // Sets options for the subsequent speech synthesis requests.
-  // Use the constants below.
-  virtual bool SetSpeakProperties(const char* props) = 0;
-
-  // Stops speaking the current utterance.
-  virtual bool StopSpeaking() = 0;
-
-  // Checks if the engine is currently speaking.
-  virtual bool IsSpeaking() = 0;
-
-  // Starts the speech synthesis service and indicates through a callback if
-  // it started successfully.
-  virtual void InitTts(InitStatusCallback) = 0;
-
-  // Factory function, creates a new instance and returns ownership.
-  // For normal usage, access the singleton via CrosLibrary::Get().
-  static SpeechSynthesisLibrary* GetImpl(bool stub);
-
-  // Constants to be used with SetSpeakProperties.
-  static const char kSpeechPropertyLocale[];
-  static const char kSpeechPropertyGender[];
-  static const char kSpeechPropertyRate[];
-  static const char kSpeechPropertyPitch[];
-  static const char kSpeechPropertyVolume[];
-  static const char kSpeechPropertyEquals[];
-  static const char kSpeechPropertyDelimiter[];
-};
-
-}  // namespace chromeos
-
-#endif  // CHROME_BROWSER_CHROMEOS_CROS_SPEECH_SYNTHESIS_LIBRARY_H_