Do not dump user source code in the code serializer.

src/assembler.h

Index: src/assembler.h
diff --git a/src/assembler.h b/src/assembler.h
index c92ef1ee9e83bd0b436441c45810ad4894b7fdb7..6d9be8277f9dd931909bc47cee2d1b2afca1fb3c 100644
--- a/src/assembler.h
+++ b/src/assembler.h
@@ -974,17 +974,6 @@ class ExternalReference BASE_EMBEDDED {
       : address_(address) {}
 
   static void* Redirect(Isolate* isolate,
-                        void* address,
-                        Type type = ExternalReference::BUILTIN_CALL) {
-    ExternalReferenceRedirector* redirector =
-        reinterpret_cast<ExternalReferenceRedirector*>(
-            isolate->external_reference_redirector());
-    if (redirector == NULL) return address;
-    void* answer = (*redirector)(address, type);
-    return answer;
-  }
-
-  static void* Redirect(Isolate* isolate,
                         Address address_arg,
                         Type type = ExternalReference::BUILTIN_CALL) {
     ExternalReferenceRedirector* redirector =