[Arm64]: Disable MSE_ClearKey/EncryptedMediaTest.FrameSizeChangeVideo on Arm64.

content/browser/media/encrypted_media_browsertest.cc

Index: content/browser/media/encrypted_media_browsertest.cc
diff --git a/content/browser/media/encrypted_media_browsertest.cc b/content/browser/media/encrypted_media_browsertest.cc
index 9f5e1377049c683c90c99ce2fcad141321a5b842..c049d307cad0ed660ae081b4a75ee91734582dfc 100644
--- a/content/browser/media/encrypted_media_browsertest.cc
+++ b/content/browser/media/encrypted_media_browsertest.cc
@@ -175,6 +175,9 @@ IN_PROC_BROWSER_TEST_P(EncryptedMediaTest, FrameSizeChangeVideo) {
 #if defined(OS_WIN)
   if (base::win::GetVersion() < base::win::VERSION_VISTA)
     return;
+#elif defined(__aarch64__)
+  // Times out on arm64 currently due to http://crbug.com/403308
+  return;
 #endif
   TestFrameSizeChange();
 }