[modules] Add partial support for debug-scopes.

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 135 matching lines @@
                              Handle<String> variable_name,
                              Handle<Object> new_value);
   bool SetContextVariableValue(Handle<ScopeInfo> scope_info,
                                Handle<Context> context,
                                Handle<String> variable_name,
                                Handle<Object> new_value);
 
   void CopyContextLocalsToScopeObject(Handle<ScopeInfo> scope_info,
                                       Handle<Context> context,
                                       Handle<JSObject> scope_object);
+  void CopyModuleVarsToScopeObject(Handle<ScopeInfo> scope_info,
+                                   Handle<Context> context,
+                                   Handle<JSObject> scope_object);
   void CopyContextExtensionToScopeObject(Handle<Context> context,
                                          Handle<JSObject> scope_object,
                                          KeyCollectionMode mode);
 
   // Get the chain of nested scopes within this scope for the source statement
   // position. The scopes will be added to the list from the outermost scope to
   // the innermost scope. Only nested block, catch or with scopes are tracked
   // and will be returned, but no inner function scopes.
   void GetNestedScopeChain(Isolate* isolate, Scope* scope,
                            int statement_position);
 
   DISALLOW_IMPLICIT_CONSTRUCTORS(ScopeIterator);
 };
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_DEBUG_DEBUG_SCOPES_H_