Disable RunsAudioVideoWebRTCCallInTwoTabs so blink can roll

This failure has been preventing blink from rolling for >12 hours.
Sample failure:

http://build.chromium.org/p/tryserver.chromium.linux/builders/linux_chromium_rel_ng/builds/66651

TBR=cevans@chromium.org,haraken@chromium.org
NOTRY=true
BUG=

Review URL: https://codereview.chromium.org/1148873003

Cr-Commit-Position: refs/heads/master@{#330763}

chrome/browser/media/chrome_webrtc_browsertest.cc

@@ -40,7 +40,10 @@ class WebRtcBrowserTest : public WebRtcTestBase {
   }
 };
 
-#if defined(OS_CHROMEOS)
+// Disable unconditionally to enable blink roll.  Sample failure:
+// http://build.chromium.org/p/tryserver.chromium.linux/builders/linux_chromium_rel_ng/builds/66651
+//#if defined(OS_CHROMEOS)
+#if 1
 #define MAYBE_RunsAudioVideoWebRTCCallInTwoTabs \
     DISABLED_RunsAudioVideoWebRTCCallInTwoTabs
 #else