Disable a crashing test.

webkit/appcache/appcache_update_job_unittest.cc

Index: webkit/appcache/appcache_update_job_unittest.cc
diff --git a/webkit/appcache/appcache_update_job_unittest.cc b/webkit/appcache/appcache_update_job_unittest.cc
index 5b42fe4a938b972d526dd2a2531e54dd2d6996a4..09c349dd2e85de7f201b86be1443691dacd83dbf 100644
--- a/webkit/appcache/appcache_update_job_unittest.cc
+++ b/webkit/appcache/appcache_update_job_unittest.cc
@@ -3038,7 +3038,14 @@ TEST_F(AppCacheUpdateJobTest, ManifestRedirect) {
   RunTestOnIOThread(&AppCacheUpdateJobTest::ManifestRedirectTest);
 }
 
-TEST_F(AppCacheUpdateJobTest, ManifestWrongMimeType) {
+#if defined(OS_MACOSX)
+// Crashing on mac webkit bots. http://crbug.com/45664
+#define MAYBE_ManifestWrongMimeType DISABLED_ManifestWrongMimeType
+#else
+#define MAYBE_ManifestWrongMimeType ManifestWrongMimeType
+#endif
+
+TEST_F(AppCacheUpdateJobTest, MAYBE_ManifestWrongMimeType) {
   RunTestOnIOThread(&AppCacheUpdateJobTest::ManifestWrongMimeTypeTest);
 }