Do not materialize context-allocated values for debug-evaluate.

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 1681 matching lines @@
       result.push(item);
     }
   }
 
   return result;
 };
 
 
 FrameMirror.prototype.evaluate = function(source, disable_break,
                                           opt_context_object) {
-  var result_array = %DebugEvaluate(this.break_id_,
-                                    this.details_.frameId(),
-                                    this.details_.inlinedFrameIndex(),
-                                    source,
-                                    Boolean(disable_break),
-                                    opt_context_object);
-  // Silently ignore local variables changes if the frame is optimized.
-  if (!this.isOptimizedFrame()) {
-    var local_scope_on_stack = result_array[1];
-    var local_scope_modifed = result_array[2];
-    for (var n in local_scope_modifed) {
-      var value_on_stack = local_scope_on_stack[n];
-      var value_modifed = local_scope_modifed[n];
-      if (value_on_stack !== value_modifed) {
-        %SetScopeVariableValue(this.break_id_,
-                               this.details_.frameId(),
-                               this.details_.inlinedFrameIndex(),
-                               0,
-                               n,
-                               value_modifed);
-      }
-    }
-  }
-  return MakeMirror(result_array[0]);
+  return MakeMirror(%DebugEvaluate(this.break_id_,
+                                   this.details_.frameId(),
+                                   this.details_.inlinedFrameIndex(),
+                                   source,
+                                   Boolean(disable_break),
+                                   opt_context_object));
 };
 
 
 FrameMirror.prototype.invocationText = function() {
   // Format frame invoaction (receiver, function and arguments).
   var result = '';
   var func = this.func();
   var receiver = this.receiver();
   if (this.isConstructCall()) {
     // For constructor frames display new followed by the function name.
@@ skipping 926 matching lines @@
   }
   if (!NUMBER_IS_FINITE(value)) {
     if (value > 0) {
       return 'Infinity';
     } else {
       return '-Infinity';
     }
   }
   return value;
 }