Add option to run ScopeIterator faster giving up nested scope chain.

src/mirror-debugger.js

 // Copyright 2006-2012 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 1674 matching lines @@
 FrameMirror.prototype.scopeCount = function() {
   return this.details_.scopeCount();
 };
 
 
 FrameMirror.prototype.scope = function(index) {
   return new ScopeMirror(this, UNDEFINED, index);
 };
 
 
-FrameMirror.prototype.allScopes = function() {
+FrameMirror.prototype.allScopes = function(opt_ignore_nested_scopes) {
   var scopeDetails = %GetAllScopesDetails(this.break_id_,
                                           this.details_.frameId(),
-                                          this.details_.inlinedFrameIndex());
+                                          this.details_.inlinedFrameIndex(),
+                                          !!opt_ignore_nested_scopes);
   var result = [];
   for (var i = 0; i < scopeDetails.length; ++i) {
     result.push(new ScopeMirror(this, UNDEFINED, i, scopeDetails[i]));
   }
   return result;
 };
 
 
 FrameMirror.prototype.stepInPositions = function() {
   var script = this.func().script();
@@ skipping 974 matching lines @@
   }
   if (!NUMBER_IS_FINITE(value)) {
     if (value > 0) {
       return 'Infinity';
     } else {
       return '-Infinity';
     }
   }
   return value;
 }