MIPS: Simplify pending message script handling.

src/mips/full-codegen-mips.cc

Index: src/mips/full-codegen-mips.cc
diff --git a/src/mips/full-codegen-mips.cc b/src/mips/full-codegen-mips.cc
index 48cb3917de5c6dda327161eef10dcd33665c8697..41fd718a5dcc501fc69296032192d7725328cdda 100644
--- a/src/mips/full-codegen-mips.cc
+++ b/src/mips/full-codegen-mips.cc
@@ -5336,12 +5336,6 @@ void FullCodeGenerator::EnterFinallyBlock() {
   __ lw(a1, MemOperand(at));
   __ SmiTag(a1);
   __ push(a1);
-
-  ExternalReference pending_message_script =
-      ExternalReference::address_of_pending_message_script(isolate());
-  __ li(at, Operand(pending_message_script));
-  __ lw(a1, MemOperand(at));
-  __ push(a1);
 }
 
 
@@ -5349,12 +5343,6 @@ void FullCodeGenerator::ExitFinallyBlock() {
   DCHECK(!result_register().is(a1));
   // Restore pending message from stack.
   __ pop(a1);
-  ExternalReference pending_message_script =
-      ExternalReference::address_of_pending_message_script(isolate());
-  __ li(at, Operand(pending_message_script));
-  __ sw(a1, MemOperand(at));
-
-  __ pop(a1);
   __ SmiUntag(a1);
   ExternalReference has_pending_message =
       ExternalReference::address_of_has_pending_message(isolate());