WebRTC: Use the MediaStream Recording API for the audio_quality_browsertest.

chrome/browser/media/webrtc/webrtc_browsertest_common.h

Index: chrome/browser/media/webrtc/webrtc_browsertest_common.h
diff --git a/chrome/browser/media/webrtc/webrtc_browsertest_common.h b/chrome/browser/media/webrtc/webrtc_browsertest_common.h
index cd3ecef1f4c34b33253057b6c1d674988f64aa3d..13e2e668f58998817b6d5ef6b06c4ba35b7b9323 100644
--- a/chrome/browser/media/webrtc/webrtc_browsertest_common.h
+++ b/chrome/browser/media/webrtc/webrtc_browsertest_common.h
@@ -62,6 +62,12 @@ bool PollingWaitUntil(const std::string& javascript,
                       content::WebContents* tab_contents,
                       int poll_interval_msec);
 
+// Same as above but we assume the message is a boolean type, thus we wait until
+// executing |javascript| sends a 'true' message.
+bool PollingWaitUntil(const std::string& javascript,
+                      content::WebContents* tab_contents,
+                      int poll_interval_msec);
+
 }  // namespace test
 
 #endif  // CHROME_BROWSER_MEDIA_WEBRTC_WEBRTC_BROWSERTEST_COMMON_H_