Revert accidental dartium code push

content/worker/worker_webkitplatformsupport_impl.cc

Index: content/worker/worker_webkitplatformsupport_impl.cc
diff --git a/content/worker/worker_webkitplatformsupport_impl.cc b/content/worker/worker_webkitplatformsupport_impl.cc
index e078b2af74d9ba7cf54b52effa7b9a5f73bc5f99..3a57f9486d6d730d28bd4ad905932481afef7a70 100644
--- a/content/worker/worker_webkitplatformsupport_impl.cc
+++ b/content/worker/worker_webkitplatformsupport_impl.cc
@@ -242,12 +242,6 @@ WorkerWebKitPlatformSupportImpl::supportsJavaScriptMIMEType(const WebString&) {
 }
 
 WebMimeRegistry::SupportsType
-WorkerWebKitPlatformSupportImpl::supportsDartMIMEType(const WebString&) {
-  NOTREACHED();
-  return WebMimeRegistry::IsSupported;
-}
-
-WebMimeRegistry::SupportsType
 WorkerWebKitPlatformSupportImpl::supportsMediaMIMEType(
     const WebString&, const WebString&, const WebString&) {
   NOTREACHED();