Revert of Disable RunsAudioVideoWebRTCCallInTwoTabs so blink can roll

chrome/browser/media/chrome_webrtc_browsertest.cc

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "base/command_line.h"
 #include "base/strings/stringprintf.h"
 #include "chrome/browser/media/webrtc_browsertest_base.h"
 #include "chrome/browser/media/webrtc_browsertest_common.h"
 #include "chrome/browser/ui/browser.h"
 #include "chrome/browser/ui/browser_tabstrip.h"
@@ skipping 22 matching lines @@
     EXPECT_FALSE(command_line->HasSwitch(switches::kUseFakeUIForMediaStream));
 
     // Always use fake devices.
     command_line->AppendSwitch(switches::kUseFakeDeviceForMediaStream);
 
     // Flag used by TestWebAudioMediaStream to force garbage collection.
     command_line->AppendSwitchASCII(switches::kJavaScriptFlags, "--expose-gc");
   }
 };
 
-// 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
+#if defined(OS_CHROMEOS)
 #define MAYBE_RunsAudioVideoWebRTCCallInTwoTabs \
     DISABLED_RunsAudioVideoWebRTCCallInTwoTabs
 #else
 #define MAYBE_RunsAudioVideoWebRTCCallInTwoTabs \
     RunsAudioVideoWebRTCCallInTwoTabs
 #endif
 
 IN_PROC_BROWSER_TEST_F(WebRtcBrowserTest,
                        MAYBE_RunsAudioVideoWebRTCCallInTwoTabs) {
   if (OnWinXp()) return;
@@ skipping 29 matching lines @@
   GURL url(embedded_test_server()->GetURL("/webrtc/webaudio_crash.html"));
   ui_test_utils::NavigateToURL(browser(), url);
   content::WebContents* tab =
       browser()->tab_strip_model()->GetActiveWebContents();
 
   // A sleep is necessary to be able to detect the crash.
   test::SleepInJavascript(tab, 1000);
 
   ASSERT_FALSE(tab->IsCrashed());
 }