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

src/contexts.h

Index: src/contexts.h
diff --git a/src/contexts.h b/src/contexts.h
index 598eeb31fa296123556ad81613d8706a17e2893c..f4a4e24cd102f9728ba1ec894970defb254946b3 100644
--- a/src/contexts.h
+++ b/src/contexts.h
@@ -405,6 +405,10 @@ class Context: public FixedArray {
     MIN_CONTEXT_SLOTS = GLOBAL_PROXY_INDEX,
     // This slot holds the thrown value in catch contexts.
     THROWN_OBJECT_INDEX = MIN_CONTEXT_SLOTS,
+
+    // These slots hold values in debug evaluate contexts.
+    WRAPPED_CONTEXT_INDEX = MIN_CONTEXT_SLOTS,
+    WHITE_LIST_INDEX = MIN_CONTEXT_SLOTS + 1
   };
 
   void IncrementErrorsThrown();
@@ -457,6 +461,7 @@ class Context: public FixedArray {
   inline bool IsFunctionContext();
   inline bool IsCatchContext();
   inline bool IsWithContext();
+  inline bool IsDebugEvaluateContext();
   inline bool IsBlockContext();
   inline bool IsModuleContext();
   inline bool IsScriptContext();