[turbofan] Rewrite ToObject as TurboFan stub.

src/crankshaft/hydrogen.cc

 // Copyright 2013 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/crankshaft/hydrogen.h"
 
 #include <memory>
 #include <sstream>
 
 #include "src/allocation-site-scopes.h"
@@ skipping 12320 matching lines @@
   } else {
     Callable callable = CodeFactory::ToInteger(isolate());
     HValue* stub = Add<HConstant>(callable.code());
     HValue* values[] = {context(), input};
     HInstruction* result = New<HCallWithDescriptor>(
         stub, 0, callable.descriptor(), ArrayVector(values));
     return ast_context()->ReturnInstruction(result, call->id());
   }
 }
 
-
-void HOptimizedGraphBuilder::GenerateToObject(CallRuntime* call) {
-  DCHECK_EQ(1, call->arguments()->length());
-  CHECK_ALIVE(VisitForValue(call->arguments()->at(0)));
-  HValue* value = Pop();
-  HValue* result = BuildToObject(value);
-  return ast_context()->ReturnValue(result);
-}
-
-
 void HOptimizedGraphBuilder::GenerateToString(CallRuntime* call) {
   DCHECK_EQ(1, call->arguments()->length());
   CHECK_ALIVE(VisitForValue(call->arguments()->at(0)));
   HValue* input = Pop();
   if (input->type().IsString()) {
     return ast_context()->ReturnValue(input);
   } else {
     Callable callable = CodeFactory::ToString(isolate());
     HValue* stub = Add<HConstant>(callable.code());
     HValue* values[] = {context(), input};
@@ skipping 1072 matching lines @@
     isolate()->GetHTracer()->TraceHydrogen(name(), graph_);
   }
 
 #ifdef DEBUG
   graph_->Verify(false);  // No full verify.
 #endif
 }
 
 }  // namespace internal
 }  // namespace v8