Revert of No longer requiring pixel output for WebRTC tests.

content/test/webrtc_content_browsertest_base.cc

Index: content/test/webrtc_content_browsertest_base.cc
diff --git a/content/test/webrtc_content_browsertest_base.cc b/content/test/webrtc_content_browsertest_base.cc
index d1d04da162a5adbfdb13b5d262448d5a77d18d18..db83501971f94d6d57e18bd42ceb669a5308e2e9 100644
--- a/content/test/webrtc_content_browsertest_base.cc
+++ b/content/test/webrtc_content_browsertest_base.cc
@@ -34,11 +34,9 @@
 }
 
 void WebRtcContentBrowserTest::SetUp() {
-  // This is needed lest we break on some virtual machines and weird bot
-  // configs, like ChromeOS and Win x64 swarming.
   EnablePixelOutput();
 #if defined(OS_CHROMEOS)
-  chromeos::CrasAudioHandler::InitializeForTesting();
+    chromeos::CrasAudioHandler::InitializeForTesting();
 #endif
   ContentBrowserTest::SetUp();
 }