Support the Aec dump for the APM in chrome

content/renderer/media/webrtc_audio_capturer.h

Index: content/renderer/media/webrtc_audio_capturer.h
diff --git a/content/renderer/media/webrtc_audio_capturer.h b/content/renderer/media/webrtc_audio_capturer.h
index 7f198eab1f540caf38f80a4c34dd7457cbdec41e..78a21811c4fab6675946cd317a5a1a8e7241d681 100644
--- a/content/renderer/media/webrtc_audio_capturer.h
+++ b/content/renderer/media/webrtc_audio_capturer.h
@@ -10,6 +10,7 @@
 
 #include "base/callback.h"
 #include "base/memory/ref_counted.h"
+#include "base/platform_file.h"
 #include "base/synchronization/lock.h"
 #include "base/threading/thread_checker.h"
 #include "base/time/time.h"
@@ -108,11 +109,14 @@ class CONTENT_EXPORT WebRtcAudioCapturer
   void GetAudioProcessingParams(base::TimeDelta* delay, int* volume,
                                 bool* key_pressed);
 
-  // Use by the unittests to inject their own source to the capturer.
+  // Used by the unittests to inject their own source to the capturer.
   void SetCapturerSourceForTesting(
       const scoped_refptr<media::AudioCapturerSource>& source,
       media::AudioParameters params);
 
+  void StartAecDump(const base::PlatformFile& aec_dump_file);
+  void StopAecDump();
+
  protected:
   friend class base::RefCountedThreadSafe<WebRtcAudioCapturer>;
   virtual ~WebRtcAudioCapturer();
@@ -145,9 +149,7 @@ class CONTENT_EXPORT WebRtcAudioCapturer
   void SetCapturerSource(
       const scoped_refptr<media::AudioCapturerSource>& source,
       media::ChannelLayout channel_layout,
-      float sample_rate,
-      int effects,
-      const blink::WebMediaConstraints& constraints);
+      float sample_rate);
 
   // Starts recording audio.
   // Triggered by AddSink() on the main render thread or a Libjingle working