Make eval compilation cache calling scope sensitive.

src/objects.h

Index: src/objects.h
diff --git a/src/objects.h b/src/objects.h
index 14a04dc5dddb1180d7e99306eb9ed32455d6756d..b2798b9bc7c5737c853169279d7346e5cc459899 100644
--- a/src/objects.h
+++ b/src/objects.h
@@ -5843,12 +5843,16 @@ class CompilationCacheTable: public HashTable<CompilationCacheShape,
  public:
   // Find cached value for a string key, otherwise return null.
   Object* Lookup(String* src);
-  Object* LookupEval(String* src, Context* context, StrictModeFlag strict_mode);
+  Object* LookupEval(String* src,
+                     Context* context,
+                     StrictModeFlag strict_mode,
+                     int scope_position);
   Object* LookupRegExp(String* source, JSRegExp::Flags flags);
   MaybeObject* Put(String* src, Object* value);
   MaybeObject* PutEval(String* src,
                        Context* context,
-                       SharedFunctionInfo* value);
+                       SharedFunctionInfo* value,
+                       int scope_position);
   MaybeObject* PutRegExp(String* src, JSRegExp::Flags flags, FixedArray* value);
 
   // Remove given value from cache.