Remove extension group from DOMWrapperWorld.

extensions/renderer/gc_callback_unittest.cc

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "base/bind.h"
 #include "base/macros.h"
 #include "base/memory/weak_ptr.h"
 #include "base/message_loop/message_loop.h"
 #include "base/run_loop.h"
 #include "extensions/common/extension.h"
@@ skipping 24 matching lines @@
  protected:
   base::MessageLoop& message_loop() { return message_loop_; }
 
   ScriptContextSet& script_context_set() { return script_context_set_; }
 
   v8::Local<v8::Context> v8_context() {
     return v8::Local<v8::Context>::New(v8::Isolate::GetCurrent(), v8_context_);
   }
 
   ScriptContext* RegisterScriptContext() {
-    // No extension group or world ID.
+    // No world ID.
     return script_context_set_.Register(
         web_frame_.frame(),
-        v8::Local<v8::Context>::New(v8::Isolate::GetCurrent(), v8_context_), 0,
-        0);
+        v8::Local<v8::Context>::New(v8::Isolate::GetCurrent(), v8_context_), 0);
   }
 
   void RequestGarbageCollection() {
     v8::Isolate::GetCurrent()->RequestGarbageCollectionForTesting(
         v8::Isolate::kFullGarbageCollection);
   }
 
  private:
   void SetUp() override {
     v8::Isolate* isolate = v8::Isolate::GetCurrent();
@@ skipping 91 matching lines @@
   // Trigger a GC. The callback should not be invoked because the fallback was
   // already invoked.
   RequestGarbageCollection();
   base::RunLoop().RunUntilIdle();
 
   EXPECT_FALSE(callback_invoked);
 }
 
 }  // namespace
 }  // namespace extensions