Remove the obsolete OverwriteMode optimization.

src/code-stubs.h

 // Copyright 2012 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.
 
 #ifndef V8_CODE_STUBS_H_
 #define V8_CODE_STUBS_H_
 
 #include "src/allocation.h"
 #include "src/assembler.h"
 #include "src/codegen.h"
@@ skipping 1211 matching lines @@
  public:
   explicit CallApiGetterStub(Isolate* isolate) : PlatformCodeStub(isolate) {}
 
   DEFINE_CALL_INTERFACE_DESCRIPTOR(ApiGetter);
   DEFINE_PLATFORM_CODE_STUB(CallApiGetter, PlatformCodeStub);
 };
 
 
 class BinaryOpICStub : public HydrogenCodeStub {
  public:
-  BinaryOpICStub(Isolate* isolate, Token::Value op,
-                 OverwriteMode mode = NO_OVERWRITE)
+  BinaryOpICStub(Isolate* isolate, Token::Value op)
       : HydrogenCodeStub(isolate, UNINITIALIZED) {
-    BinaryOpICState state(isolate, op, mode);
+    BinaryOpICState state(isolate, op);
     set_sub_minor_key(state.GetExtraICState());
   }
 
   BinaryOpICStub(Isolate* isolate, const BinaryOpICState& state)
       : HydrogenCodeStub(isolate) {
     set_sub_minor_key(state.GetExtraICState());
   }
 
   static void GenerateAheadOfTime(Isolate* isolate);
 
@@ skipping 60 matching lines @@
   static void GenerateAheadOfTime(Isolate* isolate,
                                   const BinaryOpICState& state);
 
   DEFINE_CALL_INTERFACE_DESCRIPTOR(BinaryOpWithAllocationSite);
   DEFINE_PLATFORM_CODE_STUB(BinaryOpICWithAllocationSite, PlatformCodeStub);
 };
 
 
 class BinaryOpWithAllocationSiteStub FINAL : public BinaryOpICStub {
  public:
-  BinaryOpWithAllocationSiteStub(Isolate* isolate,
-                                 Token::Value op,
-                                 OverwriteMode mode)
-      : BinaryOpICStub(isolate, op, mode) {}
+  BinaryOpWithAllocationSiteStub(Isolate* isolate, Token::Value op)
+      : BinaryOpICStub(isolate, op) {}
 
   BinaryOpWithAllocationSiteStub(Isolate* isolate, const BinaryOpICState& state)
       : BinaryOpICStub(isolate, state) {}
 
   Code::Kind GetCodeKind() const FINAL { return Code::STUB; }
 
   // Parameters accessed via CodeStubGraphBuilder::GetParameter()
   static const int kAllocationSite = 0;
   static const int kLeft = 1;
   static const int kRight = 2;
@@ skipping 1356 matching lines @@
 
 #undef DEFINE_CALL_INTERFACE_DESCRIPTOR
 #undef DEFINE_PLATFORM_CODE_STUB
 #undef DEFINE_HANDLER_CODE_STUB
 #undef DEFINE_HYDROGEN_CODE_STUB
 #undef DEFINE_CODE_STUB
 #undef DEFINE_CODE_STUB_BASE
 } }  // namespace v8::internal
 
 #endif  // V8_CODE_STUBS_H_