Revert of No longer requiring pixel output for WebRTC 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 fb5981df77163ee219c74b1779920eaadff4fc9d..ba1cfcdeca9125af9976775e6fba43e50bedc0b5 100644
--- a/chrome/browser/media/chrome_webrtc_browsertest.cc
+++ b/chrome/browser/media/chrome_webrtc_browsertest.cc
@@ -40,7 +40,15 @@
   }
 };
 
-IN_PROC_BROWSER_TEST_F(WebRtcBrowserTest, RunsAudioVideoWebRTCCallInTwoTabs) {
+#if defined(OS_WIN) || defined(OS_CHROMEOS)
+// http://crbug.com/396505
+#define MAYBE_RunsAudioVideoWebRTCCallInTwoTabs \
+    DISABLED_RunsAudioVideoWebRTCCallInTwoTabs
+#else
+#define MAYBE_RunsAudioVideoWebRTCCallInTwoTabs RunsAudioVideoWebRTCCallInTwoTabs
+#endif
+IN_PROC_BROWSER_TEST_F(WebRtcBrowserTest,
+                       MAYBE_RunsAudioVideoWebRTCCallInTwoTabs) {
   if (OnWinXp()) return;
 
   ASSERT_TRUE(embedded_test_server()->InitializeAndWaitUntilReady());