Add the "virtual" keyword on method overrides that are missing it.

chrome/browser/speech/speech_recognizer.h

 // Copyright (c) 2010 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_SPEECH_RECOGNIZER_H_
 #define CHROME_BROWSER_SPEECH_SPEECH_RECOGNIZER_H_
 
 #include <list>
 #include <string>
 #include <utility>
@@ skipping 76 matching lines @@
   bool StartRecording();
 
   // Stops recording audio and starts recognition.
   void StopRecording();
 
   // Stops recording audio and cancels recognition. Any audio recorded so far
   // gets discarded.
   void CancelRecognition();
 
   // AudioInputController::EventHandler methods.
-  void OnCreated(media::AudioInputController* controller) { }
-  void OnRecording(media::AudioInputController* controller) { }
-  void OnError(media::AudioInputController* controller, int error_code);
-  void OnData(media::AudioInputController* controller, const uint8* data,
-              uint32 size);
+  virtual void OnCreated(media::AudioInputController* controller) { }
+  virtual void OnRecording(media::AudioInputController* controller) { }
+  virtual void OnError(media::AudioInputController* controller, int error_code);
+  virtual void OnData(media::AudioInputController* controller,
+                      const uint8* data,
+                      uint32 size);
 
   // SpeechRecognitionRequest::Delegate methods.
-  void SetRecognitionResult(bool error, const SpeechInputResultArray& result);
+  virtual void SetRecognitionResult(bool error,
+                                    const SpeechInputResultArray& result);
 
   static const int kAudioSampleRate;
   static const int kAudioPacketIntervalMs;  // Duration of each audio packet.
   static const int kNumAudioChannels;
   static const int kNumBitsPerAudioSample;
   static const int kNoSpeechTimeoutSec;
   static const int kEndpointerEstimationTimeMs;
 
  private:
   void ReleaseAudioBuffers();
@@ skipping 27 matching lines @@
 
 // This typedef is to workaround the issue with certain versions of
 // Visual Studio where it gets confused between multiple Delegate
 // classes and gives a C2500 error. (I saw this error on the try bots -
 // the workaround was not needed for my machine).
 typedef SpeechRecognizer::Delegate SpeechRecognizerDelegate;
 
 }  // namespace speech_input
 
 #endif  // CHROME_BROWSER_SPEECH_SPEECH_RECOGNIZER_H_