Improve handling of property loads on the proto chain.

src/hydrogen-instructions.cc

 // 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 2614 matching lines @@
   HInstruction::Verify();
   ASSERT(HasNoUses());
 }
 
 
 void HCheckFunction::Verify() {
   HInstruction::Verify();
   ASSERT(HasNoUses());
 }
 
-
-void HCheckPrototypeMaps::Verify() {
-  HInstruction::Verify();
-  ASSERT(HasNoUses());
-}
-
 #endif
 
 } }  // namespace v8::internal