Make functions on the built-in object non-writable.

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 40c09ba3949baf1b603cc1caf3dbab0ab05d5000..2bfa6aa92c674ec7680ddb9fd67814c79a17fbf8 100644
--- a/src/mips/full-codegen-mips.cc
+++ b/src/mips/full-codegen-mips.cc
@@ -781,11 +781,10 @@ void FullCodeGenerator::VisitDeclaration(Declaration* decl) {
 void FullCodeGenerator::DeclareGlobals(Handle<FixedArray> pairs) {
   // Call the runtime to declare the globals.
   // The context is the first argument.
-  __ li(a2, Operand(pairs));
-  __ li(a1, Operand(Smi::FromInt(is_eval() ? 1 : 0)));
-  __ li(a0, Operand(Smi::FromInt(strict_mode_flag())));
-  __ Push(cp, a2, a1, a0);
-  __ CallRuntime(Runtime::kDeclareGlobals, 4);
+  __ li(a1, Operand(pairs));
+  __ li(a0, Operand(Smi::FromInt(DeclareGlobalsFlags())));
+  __ Push(cp, a1, a0);
+  __ CallRuntime(Runtime::kDeclareGlobals, 3);
   // Return value is ignored.
 }