[turbofan] Rewrite ToObject as TurboFan stub.

src/code-stubs-hydrogen.cc

Index: src/code-stubs-hydrogen.cc
diff --git a/src/code-stubs-hydrogen.cc b/src/code-stubs-hydrogen.cc
index 99faa9263415390d1757e8ec7694b8a2296bf6ac..fa7a49ebc446663cc89c681b95cb419a0c8df78f 100644
--- a/src/code-stubs-hydrogen.cc
+++ b/src/code-stubs-hydrogen.cc
@@ -1659,15 +1659,6 @@ Handle<Code> ElementsTransitionAndStoreStub::GenerateCode() {
 
 
 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);