Revert r11753.

src/assembler.cc

Index: src/assembler.cc
diff --git a/src/assembler.cc b/src/assembler.cc
index d4c49ddd459ef744b0b2230557f967ac681df434..7871f4e1cb467b3ca853d0a17e4bc35072b07deb 100644
--- a/src/assembler.cc
+++ b/src/assembler.cc
@@ -955,24 +955,6 @@ ExternalReference ExternalReference::scheduled_exception_address(
 }
 
 
-ExternalReference ExternalReference::address_of_pending_message_obj(
-    Isolate* isolate) {
-  return ExternalReference(isolate->pending_message_obj_address());
-}
-
-
-ExternalReference ExternalReference::address_of_has_pending_message(
-    Isolate* isolate) {
-  return ExternalReference(isolate->has_pending_message_address());
-}
-
-
-ExternalReference ExternalReference::address_of_pending_message_script(
-    Isolate* isolate) {
-  return ExternalReference(isolate->pending_message_script_address());
-}
-
-
 ExternalReference ExternalReference::address_of_min_int() {
   return ExternalReference(reinterpret_cast<void*>(&double_constants.min_int));
 }