Add simple playback tests for WebM and MP4 files.

chrome/browser/media_uitest.cc

Index: chrome/browser/media_uitest.cc
diff --git a/chrome/browser/media_uitest.cc b/chrome/browser/media_uitest.cc
index 51e6919a0fe2ded9d9106cbc898ec235623fcd6e..f077b149d2910f91438f9c559f3081084ae7af96 100644
--- a/chrome/browser/media_uitest.cc
+++ b/chrome/browser/media_uitest.cc
@@ -56,6 +56,24 @@ TEST_F(MediaTest, VideoBearSilentTheora) {
   PlayVideo("bear_silent.ogv");
 }
 
+TEST_F(MediaTest, VideoBearWebm) {
+  PlayVideo("bear.webm");
+}
+
+TEST_F(MediaTest, VideoBearSilentWebm) {
+  PlayVideo("bear_silent.webm");
+}
+
+#if defined(GOOGLE_CHROME_BUILD) || defined(USE_PROPRIETARY_CODECS)
+TEST_F(MediaTest, VideoBearMp4) {
+  PlayVideo("bear.mp4");
+}
+
+TEST_F(MediaTest, VideoBearSilentMp4) {
+  PlayVideo("bear_silent.mp4");
+}
+#endif
+
 TEST_F(UILayoutTest, MediaUILayoutTest) {
   static const char* kResources[] = {
     "content",