Purge unused internalized string accessors.

src/mips/lithium-codegen-mips.cc

Index: src/mips/lithium-codegen-mips.cc
diff --git a/src/mips/lithium-codegen-mips.cc b/src/mips/lithium-codegen-mips.cc
index f599c2d65749b632a188c220c5cc4f4015d8bb1d..193db1e9b76d6cd75ef2151edd2bdd776ecbe96c 100644
--- a/src/mips/lithium-codegen-mips.cc
+++ b/src/mips/lithium-codegen-mips.cc
@@ -2598,7 +2598,7 @@ void LCodeGen::EmitClassOfTest(Label* is_true,
 
   __ JumpIfSmi(input, is_false);
 
-  if (class_name->IsOneByteEqualTo(STATIC_ASCII_VECTOR("Function"))) {
+  if (String::Equals(isolate()->factory()->Function_string(), class_name)) {
     // Assuming the following assertions, we can use the same compares to test
     // for both being a function type and being in the object type range.
     STATIC_ASSERT(NUM_OF_CALLABLE_SPEC_OBJECT_TYPES == 2);
@@ -2627,7 +2627,7 @@ void LCodeGen::EmitClassOfTest(Label* is_true,
 
   // Objects with a non-function constructor have class 'Object'.
   __ GetObjectType(temp, temp2, temp2);
-  if (class_name->IsOneByteEqualTo(STATIC_ASCII_VECTOR("Object"))) {
+  if (String::Equals(class_name, isolate()->factory()->Object_string())) {
     __ Branch(is_true, ne, temp2, Operand(JS_FUNCTION_TYPE));
   } else {
     __ Branch(is_false, ne, temp2, Operand(JS_FUNCTION_TYPE));