Remove extension group from DOMWrapperWorld.

extensions/renderer/extension_frame_helper.cc

 // Copyright 2013 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 "extensions/renderer/extension_frame_helper.h"
 
 #include "base/metrics/histogram_macros.h"
 #include "base/strings/string_util.h"
 #include "base/timer/elapsed_timer.h"
 #include "content/public/renderer/render_frame.h"
@@ skipping 180 matching lines @@
 
 void ExtensionFrameHelper::DidStartProvisionalLoad() {
   if (!delayed_main_world_script_initialization_)
     return;
 
   delayed_main_world_script_initialization_ = false;
   v8::HandleScope handle_scope(v8::Isolate::GetCurrent());
   v8::Local<v8::Context> context =
       render_frame()->GetWebFrame()->mainWorldScriptContext();
   v8::Context::Scope context_scope(context);
-  extension_dispatcher_->DidCreateScriptContext(
-      render_frame()->GetWebFrame(), context, 0, 0);
+  extension_dispatcher_->DidCreateScriptContext(render_frame()->GetWebFrame(),
+                                                context, 0);
   // TODO(devlin): Add constants for main world id, no extension group.
 }
 
 void ExtensionFrameHelper::DidCreateScriptContext(
     v8::Local<v8::Context> context,
-    int extension_group,
     int world_id) {
   if (context == render_frame()->GetWebFrame()->mainWorldScriptContext() &&
       render_frame()->IsBrowserSideNavigationPending()) {
-    DCHECK_EQ(0, extension_group);
     DCHECK_EQ(0, world_id);
     DCHECK(!delayed_main_world_script_initialization_);
     // Defer initializing the extensions script context now because it depends
     // on having the URL of the provisional load which isn't available at this
     // point with PlzNavigate.
     delayed_main_world_script_initialization_ = true;
   } else {
-    extension_dispatcher_->DidCreateScriptContext(
-        render_frame()->GetWebFrame(), context, extension_group, world_id);
+    extension_dispatcher_->DidCreateScriptContext(render_frame()->GetWebFrame(),
+                                                  context, world_id);
   }
 }
 
 void ExtensionFrameHelper::WillReleaseScriptContext(
     v8::Local<v8::Context> context,
     int world_id) {
   extension_dispatcher_->WillReleaseScriptContext(
       render_frame()->GetWebFrame(), context, world_id);
 }
 
@@ skipping 88 matching lines @@
     const base::ListValue& args) {
   extension_dispatcher_->InvokeModuleSystemMethod(
       render_frame(), extension_id, module_name, function_name, args);
 }
 
 void ExtensionFrameHelper::OnDestruct() {
   delete this;
 }
 
 }  // namespace extensions