Remove trailing whitespaces from *.js files.

src/json.js

 // Copyright 2009 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 219 matching lines @@
     BasicJSONSerialize(0, val, stack, builder);
     if (before == builder.length) builder.push("null");
     for (var i = 1; i < len; i++) {
       builder.push(",");
       before = builder.length;
       BasicJSONSerialize(i, value[i], stack, builder);
       if (before == builder.length) builder[before - 1] = ",null";
     }
   }
   stack.pop();
-  builder.push("]"); 
+  builder.push("]");
 }
 
 
 function BasicSerializeObject(value, stack, builder) {
   if (!%PushIfAbsent(stack, value)) {
     throw MakeTypeError('circular_structure', $Array());
   }
   builder.push("{");
   var first = true;
   for (var p in value) {
@@ skipping 87 matching lines @@
 }
 
 function SetupJSON() {
   InstallFunctions($JSON, DONT_ENUM, $Array(
     "parse", JSONParse,
     "stringify", JSONStringify
   ));
 }
 
 SetupJSON();