Revert of Group lexical context variables for faster look up.

src/contexts.cc

Index: src/contexts.cc
diff --git a/src/contexts.cc b/src/contexts.cc
index 6bd4fcef11053c6285e02b1a98adda3e4afaf20a..9f39aecd542ca24dbbad3bf7baf1109e853494ba 100644
--- a/src/contexts.cc
+++ b/src/contexts.cc
@@ -51,19 +51,6 @@
       result->slot_index = slot_index;
       return true;
     }
-  }
-  return false;
-}
-
-
-bool ScriptContextTable::LookupLexical(Handle<ScriptContextTable> table,
-                                       Handle<String> name) {
-  for (int i = 0; i < table->used(); i++) {
-    Handle<Context> context = GetContext(table, i);
-    DCHECK(context->IsScriptContext());
-    Handle<ScopeInfo> scope_info(ScopeInfo::cast(context->extension()));
-    int slot_index = ScopeInfo::LexicalContextSlotIndex(scope_info, name);
-    if (slot_index >= 0) return true;
   }
   return false;
 }