[turbofan] Rewrite ToObject as TurboFan stub.

src/code-stubs-hydrogen.cc

 // 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.
 
 #include "src/code-stubs.h"
 
 #include <memory>
 
 #include "src/bailout-reason.h"
 #include "src/crankshaft/hydrogen.h"
@@ skipping 1641 matching lines @@
   return value;
 }
 
 
 Handle<Code> ElementsTransitionAndStoreStub::GenerateCode() {
   return DoGenerateCode(this);
 }
 
 
 template <>
-HValue* CodeStubGraphBuilder<ToObjectStub>::BuildCodeStub() {
-  HValue* receiver = GetParameter(Descriptor::kArgument);
-  return BuildToObject(receiver);
-}
-
-
-Handle<Code> ToObjectStub::GenerateCode() { return DoGenerateCode(this); }
-
-template <>
 HValue* CodeStubGraphBuilder<LoadDictionaryElementStub>::BuildCodeStub() {
   HValue* receiver = GetParameter(Descriptor::kReceiver);
   HValue* key = GetParameter(Descriptor::kName);
 
   Add<HCheckSmi>(key);
 
   HValue* elements = AddLoadElements(receiver);
 
   HValue* hash = BuildElementIndexHash(key);
 
@@ skipping 271 matching lines @@
   return Pop();
 }
 
 
 Handle<Code> KeyedLoadGenericStub::GenerateCode() {
   return DoGenerateCode(this);
 }
 
 }  // namespace internal
 }  // namespace v8