Remove trailing spaces from js files.

src/mirror-debugger.js

 // Copyright 2006-2008 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 1593 matching lines @@
       }
       result += this.argumentValue(i).toText();
     }
     result += ')';
   }
 
   if (this.isAtReturn()) {
     result += ' returning ';
     result += this.returnValue().toText();
   }
-  
+
   return result;
 }
 
 
 FrameMirror.prototype.sourceAndPositionText = function() {
   // Format source and position.
   var result = '';
   var func = this.func();
   if (func.resolved()) {
     if (func.script()) {
@@ skipping 746 matching lines @@
   }
   if (!isFinite(value)) {
     if (value > 0) {
       return 'Infinity';
     } else {
       return '-Infinity';
     }
   }
   return value;
 }