Disable crashing media tests on Mac.

content/browser/media/media_browsertest.cc

Index: content/browser/media/media_browsertest.cc
diff --git a/content/browser/media/media_browsertest.cc b/content/browser/media/media_browsertest.cc
index 4f6779926ced6182fd0d676711f618f96f4424fe..2f52ad5a9d7376edda92c196e7dc02992e86bb37 100644
--- a/content/browser/media/media_browsertest.cc
+++ b/content/browser/media/media_browsertest.cc
@@ -127,7 +127,13 @@ IN_PROC_BROWSER_TEST_P(MediaTest, VideoBearSilentWebm) {
 }
 
 #if defined(USE_PROPRIETARY_CODECS)
-IN_PROC_BROWSER_TEST_P(MediaTest, VideoBearMp4) {
+// Crashes on Mac only.  http://crbug.com/621857
+#if defined(OS_MACOSX)
+#define MAYBE_VideoBearMp4 DISABLED_VideoBearMp4
+#else
+#define MAYBE_VideoBearMp4 VideoBearMp4
+#endif
+IN_PROC_BROWSER_TEST_P(MediaTest, MAYBE_VideoBearMp4) {
   PlayVideo("bear.mp4", GetParam());
 }
 
@@ -135,7 +141,13 @@ IN_PROC_BROWSER_TEST_P(MediaTest, VideoBearHighBitDepthMp4) {
   PlayVideo("bear-320x180-hi10p.mp4", GetParam());
 }
 
-IN_PROC_BROWSER_TEST_P(MediaTest, VideoBearSilentMp4) {
+// Crashes on Mac only.  http://crbug.com/621857
+#if defined(OS_MACOSX)
+#define MAYBE_VideoBearSilentMp4 DISABLED_VideoBearSilentMp4
+#else
+#define MAYBE_VideoBearSilentMp4 VideoBearSilentMp4
+#endif
+IN_PROC_BROWSER_TEST_P(MediaTest, MAYBE_VideoBearSilentMp4) {
   PlayVideo("bear_silent.mp4", GetParam());
 }