[stubs] Unify (and optimize) implementation of ToObject.

src/code-stubs.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 <sstream>
 
 #include "src/bootstrapper.h"
 #include "src/cpu-profiler.h"
@@ skipping 654 matching lines @@
 }
 
 
 void ElementsTransitionAndStoreStub::InitializeDescriptor(
     CodeStubDescriptor* descriptor) {
   descriptor->Initialize(
       FUNCTION_ADDR(Runtime_ElementsTransitionAndStoreIC_Miss));
 }
 
 
+void ToObjectStub::InitializeDescriptor(CodeStubDescriptor* descriptor) {
+  descriptor->Initialize(Runtime::FunctionForId(Runtime::kToObject)->entry);
+}
+
+
 CallInterfaceDescriptor StoreTransitionStub::GetCallInterfaceDescriptor()
     const {
   return StoreTransitionDescriptor(isolate());
 }
 
 
 void FastNewClosureStub::InitializeDescriptor(CodeStubDescriptor* descriptor) {
   descriptor->Initialize(
       Runtime::FunctionForId(Runtime::kNewClosureFromStubFailure)->entry);
 }
@@ skipping 386 matching lines @@
 
   if (type->Is(Type::UntaggedPointer())) {
     return Representation::External();
   }
 
   DCHECK(!type->Is(Type::Untagged()));
   return Representation::Tagged();
 }
 }  // namespace internal
 }  // namespace v8