Add OAuth2 authentication for some voice transcription requests.

content/browser/speech/speech_recognition_engine.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 CONTENT_BROWSER_SPEECH_SPEECH_RECOGNITION_ENGINE_H_
 #define CONTENT_BROWSER_SPEECH_SPEECH_RECOGNITION_ENGINE_H_
 
 #include <string>
 
 #include "base/basictypes.h"
@@ skipping 41 matching lines @@
     std::string language;
     SpeechRecognitionGrammarArray grammars;
     bool filter_profanities;
     bool continuous;
     bool interim_results;
     uint32 max_hypotheses;
     std::string hardware_info;
     std::string origin_url;
     int audio_sample_rate;
     int audio_num_bits_per_sample;
+    std::string auth_token;
+    std::string auth_scope;
   };
 
   virtual ~SpeechRecognitionEngine() {}
 
   // Set/change the recognition engine configuration. It is not allowed to call
   // this function while a recognition is ongoing.
   virtual void SetConfig(const Config& config) = 0;
 
   // Called when the speech recognition begins, before any TakeAudioChunk call.
   virtual void StartRecognition() = 0;
@@ skipping 31 matching lines @@
 
 // These typedefs are to workaround the issue with certain versions of
 // Visual Studio where it gets confused between multiple Delegate
 // classes and gives a C2500 error.
 typedef SpeechRecognitionEngine::Delegate SpeechRecognitionEngineDelegate;
 typedef SpeechRecognitionEngine::Config SpeechRecognitionEngineConfig;
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_SPEECH_SPEECH_RECOGNITION_ENGINE_H_