Remove extension group from DOMWrapperWorld.

extensions/renderer/script_context_set_unittest.cc

Index: extensions/renderer/script_context_set_unittest.cc
diff --git a/extensions/renderer/script_context_set_unittest.cc b/extensions/renderer/script_context_set_unittest.cc
index 48eae81cbfcc2bf1ac3482e5da23a591b076e521..2b55f5dd6131540c23f0a324bf8a1f8fb8bb5473 100644
--- a/extensions/renderer/script_context_set_unittest.cc
+++ b/extensions/renderer/script_context_set_unittest.cc
@@ -36,8 +36,8 @@ TEST(ScriptContextSetTest, Lifecycle) {
 
   ExtensionIdSet active_extensions;
   ScriptContextSet context_set(&active_extensions);
-  ScriptContext* context = context_set.Register(
-      web_frame.frame(), v8_context, 0, 0);  // no extension group or world ID
+  ScriptContext* context =
+      context_set.Register(web_frame.frame(), v8_context, 0);  // no world ID
 
   // Context is valid and resembles correctness.
   EXPECT_TRUE(context->is_valid());