Remove the obsolete OverwriteMode optimization.

src/code-factory.cc

 // Copyright 2014 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/v8.h"
 
 #include "src/bootstrapper.h"
 #include "src/code-factory.h"
 #include "src/ic/ic.h"
 
@@ skipping 72 matching lines @@
 
 
 // static
 Callable CodeFactory::CompareIC(Isolate* isolate, Token::Value op) {
   Handle<Code> code = CompareIC::GetUninitialized(isolate, op);
   return Callable(code, BinaryOpDescriptor(isolate));
 }
 
 
 // static
-Callable CodeFactory::BinaryOpIC(Isolate* isolate, Token::Value op,
-                                 OverwriteMode mode) {
-  BinaryOpICStub stub(isolate, op, mode);
+Callable CodeFactory::BinaryOpIC(Isolate* isolate, Token::Value op) {
+  BinaryOpICStub stub(isolate, op);
   return Callable(stub.GetCode(), stub.GetCallInterfaceDescriptor());
 }
 
 
 // static
 Callable CodeFactory::ToBoolean(Isolate* isolate,
                                 ToBooleanStub::ResultMode mode,
                                 ToBooleanStub::Types types) {
   ToBooleanStub stub(isolate, mode, types);
   return Callable(stub.GetCode(), stub.GetCallInterfaceDescriptor());
@@ skipping 24 matching lines @@
 
 // static
 Callable CodeFactory::CallFunction(Isolate* isolate, int argc,
                                    CallFunctionFlags flags) {
   CallFunctionStub stub(isolate, argc, flags);
   return Callable(stub.GetCode(), stub.GetCallInterfaceDescriptor());
 }
 
 }  // namespace internal
 }  // namespace v8