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

services/ui/ws/window_tree_client_unittest.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 <stddef.h>
 #include <stdint.h>
 
 #include "base/bind.h"
 #include "base/macros.h"
 #include "base/memory/ptr_util.h"
@@ skipping 414 matching lines @@
       on_change_completed_result_ = success;
       change_completed_run_loop_->Quit();
     }
   }
   void RequestClose(uint32_t window_id) override {}
   void GetWindowManager(mojo::AssociatedInterfaceRequest<mojom::WindowManager>
                             internal) override {
     window_manager_binding_ =
         base::MakeUnique<mojo::AssociatedBinding<mojom::WindowManager>>(
             this, std::move(internal));
-    tree_->GetWindowManagerClient(
-        MakeRequest(&window_manager_client_, tree_.associated_group()));
+    tree_->GetWindowManagerClient(MakeRequest(&window_manager_client_));
   }
 
   // mojom::WindowManager:
   void OnConnect(uint16_t client_id) override {}
   void WmNewDisplayAdded(const display::Display& display,
                          mojom::WindowDataPtr root_data,
                          bool drawn) override {
     NOTIMPLEMENTED();
   }
   void WmDisplayRemoved(int64_t display_id) override { NOTIMPLEMENTED(); }
@@ skipping 1778 matching lines @@
 
 // TODO(sky): make sure coverage of what was
 // WindowManagerTest.SecondEmbedRoot_InitService and
 // WindowManagerTest.MultipleEmbedRootsBeforeWTHReady gets added to window
 // manager
 // tests.
 
 }  // namespace test
 }  // namespace ws
 }  // namespace ui