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

BUG=403308

Review URL: https://codereview.chromium.org/471573002

Cr-Commit-Position: refs/heads/master@{#289416}
git-svn-id: svn://svn.chromium.org/chrome/trunk/src@289416 0039d316-1c4b-4281-b951-d872f2087c98

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();
 }