Revert r3583 which seems to degrade performance.

Review URL: http://codereview.chromium.org/536042

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@3597 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/runtime.js

@@ -430,7 +430,7 @@ function APPLY_PREPARE(args) {
     }
   }
 
-  length = (args == null) ? 0 : TO_UINT32(args.length);
+  length = (args == null) ? 0 : %ToUint32(args.length);
 
   // We can handle any number of apply arguments if the stack is
   // big enough, but sanity check the value to avoid overflow when