Canonicalize handles for optimized compilation.

src/mips/macro-assembler-mips.cc

Index: src/mips/macro-assembler-mips.cc
diff --git a/src/mips/macro-assembler-mips.cc b/src/mips/macro-assembler-mips.cc
index b1f7ead8d02aab0521da4f47edbefafb5ff72bc8..945dde164ed0e062c5e384581cb74bc6c2586a80 100644
--- a/src/mips/macro-assembler-mips.cc
+++ b/src/mips/macro-assembler-mips.cc
@@ -25,8 +25,8 @@ MacroAssembler::MacroAssembler(Isolate* arg_isolate, void* buffer, int size)
       has_frame_(false),
       has_double_zero_reg_set_(false) {
   if (isolate() != NULL) {
-    code_object_ = Handle<Object>(isolate()->heap()->undefined_value(),
-                                  isolate());
+    code_object_ =
+        Handle<Object>::New(isolate()->heap()->undefined_value(), isolate());
   }
 }