Wire up Beamformer in AudioProcessing

R=andrew@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/38449004

git-svn-id: http://webrtc.googlecode.com/svn/trunk@7969 4adac7df-926f-26a2-2b94-8c16560cd09d
diff --git a/webrtc/modules/audio_processing/include/audio_processing.h b/webrtc/modules/audio_processing/include/audio_processing.h
index 1cca0ed..79340ae 100644
--- a/webrtc/modules/audio_processing/include/audio_processing.h
+++ b/webrtc/modules/audio_processing/include/audio_processing.h
@@ -82,6 +82,14 @@
   bool enabled;
 };
 
+// Use to enable beamforming. Must be provided through the constructor. It will
+// have no impact if used with AudioProcessing::SetExtraOptions().
+struct Beamforming {
+  Beamforming() : enabled(false) {}
+  explicit Beamforming(bool enabled) : enabled(enabled) {}
+  bool enabled;
+};
+
 static const int kAudioProcMaxNativeSampleRateHz = 32000;
 
 // The Audio Processing Module (APM) provides a collection of voice processing