Adding key press detection in the browser process.

media/base/audio_capturer_source.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 MEDIA_BASE_AUDIO_CAPTURER_SOURCE_H_
 #define MEDIA_BASE_AUDIO_CAPTURER_SOURCE_H_
 
 #include <string>
 #include <vector>
 #include "base/basictypes.h"
 #include "base/memory/ref_counted.h"
 #include "media/audio/audio_parameters.h"
 #include "media/base/audio_bus.h"
 #include "media/base/media_export.h"
 
 namespace media {
 
 // AudioCapturerSource is an interface representing the source for
 // captured audio.  An implementation will periodically call Capture() on a
 // callback object.
 class AudioCapturerSource
     : public base::RefCountedThreadSafe<media::AudioCapturerSource> {
  public:
   class CaptureCallback {
    public:
     // Callback to deliver the captured data from the OS.
     virtual void Capture(AudioBus* audio_source,
                          int audio_delay_milliseconds,
-                         double volume) = 0;
+                         double volume,
+                         bool key_pressed) = 0;
 
     // Signals an error has occurred.
     virtual void OnCaptureError() = 0;
 
    protected:
     virtual ~CaptureCallback() {}
   };
 
   // Sets information about the audio stream format and the device
   // to be used. It must be called before any of the other methods.
@@ skipping 19 matching lines @@
   virtual void SetAutomaticGainControl(bool enable) = 0;
 
  protected:
   friend class base::RefCountedThreadSafe<AudioCapturerSource>;
   virtual ~AudioCapturerSource() {}
 };
 
 }  // namespace media
 
 #endif  // MEDIA_BASE_AUDIO_CAPTURER_SOURCE_H_