Make ToBooleanStub more consistent across platforms.

src/code-stubs.h

 // Copyright 2011 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 983 matching lines @@
 
   const char* GetName() { return "KeyedStoreExternalArrayStub"; }
 
   DECLARE_ARRAY_STUB_PRINT(KeyedStoreExternalArrayStub)
 
  protected:
   JSObject::ElementsKind elements_kind_;
 };
 
 
+class ToBooleanStub: public CodeStub {
+ public:
+  explicit ToBooleanStub(Register tos) : tos_(tos) { }
+
+  void Generate(MacroAssembler* masm);
+
+ private:
+  Register tos_;
+  Major MajorKey() { return ToBoolean; }
+  int MinorKey() { return tos_.code(); }
+};
+
 } }  // namespace v8::internal
 
 #endif  // V8_CODE_STUBS_H_