Mojo C++ bindings: remove some usage of AssociatedGroup from user code.

services/ui/ws/window_tree_binding.cc

 // Copyright 2014 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 "services/ui/ws/window_tree_binding.h"
 
 #include "base/bind.h"
 #include "services/ui/ws/window_server.h"
 #include "services/ui/ws/window_tree.h"
 
@@ skipping 31 matching lines @@
       client_(std::move(client)) {}
 
 DefaultWindowTreeBinding::~DefaultWindowTreeBinding() {}
 
 mojom::WindowTreePtr DefaultWindowTreeBinding::CreateInterfacePtrAndBind() {
   DCHECK(!binding_.is_bound());
   return binding_.CreateInterfacePtrAndBind();
 }
 
 mojom::WindowManager* DefaultWindowTreeBinding::GetWindowManager() {
-  client_->GetWindowManager(
-      MakeRequest(&window_manager_internal_, client_.associated_group()));
+  client_->GetWindowManager(MakeRequest(&window_manager_internal_));
   return window_manager_internal_.get();
 }
 
 void DefaultWindowTreeBinding::SetIncomingMethodCallProcessingPaused(
     bool paused) {
   if (paused)
     binding_.PauseIncomingMethodCallProcessing();
   else
     binding_.ResumeIncomingMethodCallProcessing();
 }
 
 mojom::WindowTreeClient* DefaultWindowTreeBinding::CreateClientForShutdown() {
   client_.reset();
   MakeRequest(&client_);
   return client_.get();
 }
 
 }  // namespace ws
 }  // namespace ui