[debugger] allow debug-evaluate to change stack and context values.

src/debug/debug-scopes.h

 // Copyright 2015 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_DEBUG_DEBUG_SCOPES_H_
 #define V8_DEBUG_DEBUG_SCOPES_H_
 
 #include "src/debug/debug-frames.h"
 #include "src/frames.h"
 
@@ skipping 57 matching lines @@
 
   // Set variable value and return true on success.
   bool SetVariableValue(Handle<String> variable_name, Handle<Object> new_value);
 
   Handle<ScopeInfo> CurrentScopeInfo();
 
   // Return the context for this scope. For the local context there might not
   // be an actual context.
   Handle<Context> CurrentContext();
 
-  // Populate the list with collected non-local variable names.
-  void GetNonLocals(List<Handle<String> >* list_out);
+  // Populate the dictionary with collected non-local variable names.
+  Handle<NameDictionary> GetNonLocals();
 
   bool ThisIsNonLocal();
 
 #ifdef DEBUG
   // Debug print of the content of the current scope.
   void DebugPrint();
 #endif
 
  private:
   struct ExtendedScopeInfo {
@@ skipping 68 matching lines @@
   void GetNestedScopeChain(Isolate* isolate, Scope* scope,
                            int statement_position);
 
   DISALLOW_IMPLICIT_CONSTRUCTORS(ScopeIterator);
 };
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_DEBUG_DEBUG_SCOPES_H_