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..f0bf7b11ac56f678fcfa2d026a6877b620651b7c 100644
--- a/extensions/renderer/script_context_set_unittest.cc
+++ b/extensions/renderer/script_context_set_unittest.cc
@@ -12,6 +12,7 @@
 #include "extensions/renderer/scoped_web_frame.h"
 #include "extensions/renderer/script_context.h"
 #include "extensions/renderer/script_context_set.h"
+#include "extensions/renderer/test_extensions_renderer_client.h"
 #include "gin/public/context_holder.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "third_party/WebKit/public/web/WebFrame.h"
@@ -22,6 +23,8 @@ namespace extensions {
 TEST(ScriptContextSetTest, Lifecycle) {
   base::MessageLoop loop;
   ScopedWebFrame web_frame;
+  // Used by ScriptContextSet::Register().
+  TestExtensionsRendererClient extensions_renderer_client;
 
   // Do this after construction of the webview, since it may construct the
   // Isolate.
@@ -36,8 +39,8 @@ 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());