Turn ToNumberStub into a hydrogen code stub.

src/code-stubs.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 456 matching lines @@
   InterruptStub() { }
 
   void Generate(MacroAssembler* masm);
 
  private:
   Major MajorKey() { return Interrupt; }
   int MinorKey() { return 0; }
 };
 
 
-class ToNumberStub: public PlatformCodeStub {
+class ToNumberStub: public HydrogenCodeStub {
  public:
   ToNumberStub() { }
 
-  void Generate(MacroAssembler* masm);
+  virtual Handle<Code> GenerateCode();
+
+  virtual void InitializeInterfaceDescriptor(
+      Isolate* isolate,
+      CodeStubInterfaceDescriptor* descriptor);
 
  private:
   Major MajorKey() { return ToNumber; }
-  int MinorKey() { return 0; }
+  int NotMissMinorKey() { return 0; }
 };
 
 
 class FastNewClosureStub : public PlatformCodeStub {
  public:
   explicit FastNewClosureStub(LanguageMode language_mode, bool is_generator)
     : language_mode_(language_mode),
       is_generator_(is_generator) { }
 
   void Generate(MacroAssembler* masm);
@@ skipping 1917 matching lines @@
   int MinorKey() { return 0; }
 
   void Generate(MacroAssembler* masm);
 
   DISALLOW_COPY_AND_ASSIGN(ProfileEntryHookStub);
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_CODE_STUBS_H_