[debugger] fix debug-evaluate wrt shadowed context var.

src/ast/scopes.h

Index: src/ast/scopes.h
diff --git a/src/ast/scopes.h b/src/ast/scopes.h
index b0e4d489b44e7da5a07a209576a57e561fecf963..152ef3f15b917bdd55c80f8daf786a94d384c237 100644
--- a/src/ast/scopes.h
+++ b/src/ast/scopes.h
@@ -6,6 +6,7 @@
 #define V8_AST_SCOPES_H_
 
 #include "src/ast/ast.h"
+#include "src/hashmap.h"
 #include "src/pending-compilation-error-handler.h"
 #include "src/zone.h"
 
@@ -545,6 +546,8 @@ class Scope: public ZoneObject {
   void GetNestedScopeChain(Isolate* isolate, List<Handle<ScopeInfo> >* chain,
                            int statement_position);
 
+  void CollectNonLocals(HashMap* non_locals);
+
   // ---------------------------------------------------------------------------
   // Strict mode support.
   bool IsDeclared(const AstRawString* name) {