Disable Mac AVFoundation for WebRTC browser tests.

chrome/browser/media/chrome_webrtc_browsertest.cc

Index: chrome/browser/media/chrome_webrtc_browsertest.cc
diff --git a/chrome/browser/media/chrome_webrtc_browsertest.cc b/chrome/browser/media/chrome_webrtc_browsertest.cc
index 892df322c1685d24f5f51bfa0f2f98bb99e1073c..b3a9c8e21a7de7e51dd62d7d7e8426e493976559 100644
--- a/chrome/browser/media/chrome_webrtc_browsertest.cc
+++ b/chrome/browser/media/chrome_webrtc_browsertest.cc
@@ -53,6 +53,12 @@ class WebRtcBrowserTest : public WebRtcTestBase {
     EXPECT_FALSE(command_line->HasSwitch(
         switches::kUseFakeUIForMediaStream));
 
+#if defined(OS_MACOSX)
+    // TODO(mcasas): Remove this switch when ManyCam virtual video capture
+    // device starts supporting AVFoundation, see http://crbug.com/327618.
+    command_line->AppendSwitch(switches::kDisableAVFoundation);
+#endif
+
     // Flag used by TestWebAudioMediaStream to force garbage collection.
     command_line->AppendSwitchASCII(switches::kJavaScriptFlags, "--expose-gc");
   }