Re-enabling 720p WebRTC video quality test.

chrome/browser/media/chrome_webrtc_video_quality_browsertest.cc

Index: chrome/browser/media/chrome_webrtc_video_quality_browsertest.cc
diff --git a/chrome/browser/media/chrome_webrtc_video_quality_browsertest.cc b/chrome/browser/media/chrome_webrtc_video_quality_browsertest.cc
index 20510c3943dadae24ebddeff1b76a584e387dade..347a14309ed6c776198de71850527f99cd5af8cf 100644
--- a/chrome/browser/media/chrome_webrtc_video_quality_browsertest.cc
+++ b/chrome/browser/media/chrome_webrtc_video_quality_browsertest.cc
@@ -68,14 +68,9 @@ static const struct VideoQualityTestConfig {
   { "360p", 640, 360,
     test::kReferenceFileName360p,
     WebRtcTestBase::kAudioVideoCallConstraints360p },
-    // TODO(phoglund): Temporarily disabled on Windows because 720p has become
-    // very, very slow on Windows (550s).
-    // See https://code.google.com/p/webrtc/issues/detail?id=4986.
-#if !defined(OS_WIN)
     { "720p", 1280, 720,
     test::kReferenceFileName720p,
     WebRtcTestBase::kAudioVideoCallConstraints720p },
-#endif
 };
 
 // Test the video quality of the WebRTC output.
@@ -337,6 +332,8 @@ IN_PROC_BROWSER_TEST_P(WebRtcVideoQualityBrowserTest,
       polling_interval_msec));
 
   HangUp(left_tab);
+  CloseLastLocalStream(left_tab);
+  CloseLastLocalStream(right_tab);
 
   WriteCapturedFramesToWorkingDir(right_tab);