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

chrome/browser/media/webrtc_browsertest_perf.h

Index: chrome/browser/media/webrtc_browsertest_perf.h
diff --git a/chrome/browser/media/webrtc_browsertest_perf.h b/chrome/browser/media/webrtc_browsertest_perf.h
index d469a732ecbde0b70b8e19b7bf908458208491fe..19934f6832b1806f5cc1bf40c687e2418cf387bd 100644
--- a/chrome/browser/media/webrtc_browsertest_perf.h
+++ b/chrome/browser/media/webrtc_browsertest_perf.h
@@ -9,6 +9,8 @@ namespace base {
 class DictionaryValue;
 }
 
+namespace test {
+
 // These functions takes parsed data (on one peer connection) from the
 // peerConnectionDataStore object that is backing webrtc-internals and prints
 // metrics they consider interesting using testing/perf/perf_test.h primitives.
@@ -20,4 +22,6 @@ class DictionaryValue;
 void PrintBweForVideoMetrics(const base::DictionaryValue& pc_dict);
 void PrintMetricsForAllStreams(const base::DictionaryValue& pc_dict);
 
+}  // namespace test
+
 #endif  // CHROME_BROWSER_MEDIA_WEBRTC_BROWSERTEST_PERF_H_