[turbofan] Rewrite ToObject as TurboFan stub.

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/code-stub-assembler.h"
@@ skipping 3135 matching lines @@
 };
 
 class ToNameStub final : public PlatformCodeStub {
  public:
   explicit ToNameStub(Isolate* isolate) : PlatformCodeStub(isolate) {}
 
   DEFINE_CALL_INTERFACE_DESCRIPTOR(TypeConversion);
   DEFINE_PLATFORM_CODE_STUB(ToName, PlatformCodeStub);
 };
 
-
-class ToObjectStub final : public HydrogenCodeStub {
+class ToObjectStub final : public TurboFanCodeStub {
  public:
-  explicit ToObjectStub(Isolate* isolate) : HydrogenCodeStub(isolate) {}
+  explicit ToObjectStub(Isolate* isolate) : TurboFanCodeStub(isolate) {}
 
   DEFINE_CALL_INTERFACE_DESCRIPTOR(TypeConversion);
-  DEFINE_HYDROGEN_CODE_STUB(ToObject, HydrogenCodeStub);
+  DEFINE_TURBOFAN_CODE_STUB(ToObject, TurboFanCodeStub);
 };
 
 #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
 
 extern Representation RepresentationFromType(Type* type);
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_CODE_STUBS_H_