Remove WindowTreeClientDelegate::GetCaptureClient() and WindowTreeClient::GetCaptureClient().

services/ui/ws/window_server_test_base.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 "services/ui/ws/window_server_test_base.h"
 
 #include "base/bind.h"
 #include "base/location.h"
 #include "base/memory/ptr_util.h"
 #include "base/run_loop.h"
@@ skipping 125 matching lines @@
     aura::WindowTreeHostMus* window_tree_host) {
   if (!DeleteWindowTreeHost(window_tree_host)) {
     // Assume a subclass called Embed() and wants us to destroy it.
     delete window_tree_host;
   }
 }
 
 void WindowServerTestBase::OnPointerEventObserved(const ui::PointerEvent& event,
                                                   aura::Window* target) {}
 
-aura::client::CaptureClient* WindowServerTestBase::GetCaptureClient() {
-  return wm_state_.capture_controller();
-}
-
 aura::PropertyConverter* WindowServerTestBase::GetPropertyConverter() {
   return &property_converter_;
 }
 
 void WindowServerTestBase::SetWindowManagerClient(
     aura::WindowManagerClient* client) {
   window_manager_client_ = client;
 }
 
 bool WindowServerTestBase::OnWmSetBounds(aura::Window* window,
@@ skipping 125 matching lines @@
        ++iter) {
     if ((*iter).get() == window_tree_host) {
       window_tree_hosts_.erase(iter);
       return true;
     }
   }
   return false;
 }
 
 }  // namespace ui