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

src/ast/scopes.cc

Index: src/ast/scopes.cc
diff --git a/src/ast/scopes.cc b/src/ast/scopes.cc
index ff4828e8cb33a3b1a6aa91bf4fe82394a1747198..8c130b0f9e97df1ddc6f04cb0c100032fa3e5351 100644
--- a/src/ast/scopes.cc
+++ b/src/ast/scopes.cc
@@ -208,7 +208,8 @@ Scope* Scope::DeserializeScopeChain(Isolate* isolate, Zone* zone,
   Scope* current_scope = NULL;
   Scope* innermost_scope = NULL;
   while (!context->IsNativeContext()) {
-    if (context->IsWithContext()) {
+    if (context->IsWithContext() || context->IsDebugEvaluateContext()) {
+      // For scope analysis, debug-evaluate is equivalent to a with scope.
       Scope* with_scope = new (zone)
           Scope(zone, current_scope, WITH_SCOPE, Handle<ScopeInfo>::null(),
                 script_scope->ast_value_factory_);