Relanding Switched main WebRTC browser tests to use a more realistic video

chrome/browser/media/chrome_media_stream_infobar_browsertest.cc

Index: chrome/browser/media/chrome_media_stream_infobar_browsertest.cc
diff --git a/chrome/browser/media/chrome_media_stream_infobar_browsertest.cc b/chrome/browser/media/chrome_media_stream_infobar_browsertest.cc
index 4e686d5f9b104d3ca363dca3f0a11e81a03ac87c..b3ac70a780416f05f1e3277f16fcdd755ab6ce57 100644
--- a/chrome/browser/media/chrome_media_stream_infobar_browsertest.cc
+++ b/chrome/browser/media/chrome_media_stream_infobar_browsertest.cc
@@ -119,9 +119,9 @@ IN_PROC_BROWSER_TEST_F(MediaStreamInfoBarTest,
 
   // Should fail with permission denied right away with no infobar popping up.
   GetUserMedia(tab_contents, kAudioVideoCallConstraints);
-  EXPECT_TRUE(PollingWaitUntil("obtainGetUserMediaResult()",
-                               kFailedWithPermissionDeniedError,
-                               tab_contents));
+  EXPECT_TRUE(test::PollingWaitUntil("obtainGetUserMediaResult()",
+                                     kFailedWithPermissionDeniedError,
+                                     tab_contents));
   InfoBarService* infobar_service =
       InfoBarService::FromWebContents(tab_contents);
   EXPECT_EQ(0u, infobar_service->infobar_count());