Implement Google network speech synthesis

chrome/browser/speech/tts_controller.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_TTS_CONTROLLER_H_
 #define CHROME_BROWSER_SPEECH_TTS_CONTROLLER_H_
 
 #include <queue>
 #include <set>
 #include <string>
@@ skipping 48 matching lines @@
 struct VoiceData {
   VoiceData();
   ~VoiceData();
 
   std::string name;
   std::string lang;
   TtsGenderType gender;
   std::string extension_id;
   std::set<TtsEventType> events;
 
+  // If true, the synthesis engine is a remote network resource.
+  // It may be higher latency and may incur bandwidth costs.
+  bool remote;
+
   // If true, this is implemented by this platform's subclass of
   // TtsPlatformImpl. If false, this is implemented by an extension.
   bool native;
   std::string native_voice_identifier;
 };
 
 // Class that wants to receive events on utterances.
 class UtteranceEventDelegate {
  public:
   virtual ~UtteranceEventDelegate() {}
@@ skipping 258 matching lines @@
   std::set<VoicesChangedDelegate*> voices_changed_delegates_;
 
   // A pointer to the platform implementation of text-to-speech, for
   // dependency injection.
   TtsPlatformImpl* platform_impl_;
 
   DISALLOW_COPY_AND_ASSIGN(TtsController);
 };
 
 #endif  // CHROME_BROWSER_SPEECH_TTS_CONTROLLER_H_