Adds couple of functions to WindowManagerDelegate:

services/ui/test_wm/test_wm.cc

 // Copyright 2016 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 <memory>
 #include <utility>
 
 #include "base/memory/ptr_util.h"
 #include "base/threading/thread_task_runner_handle.h"
 #include "mojo/public/cpp/bindings/binding.h"
@@ skipping 44 matching lines @@
   void OnStart() override {
     CHECK(!started_);
     started_ = true;
     test_screen_ = base::MakeUnique<display::test::TestScreen>();
     display::Screen::SetScreenInstance(test_screen_.get());
     aura_env_ = aura::Env::CreateInstance(aura::Env::Mode::MUS);
     gpu_service_ = ui::GpuService::Create(context()->connector(), nullptr);
     compositor_context_factory_ =
         base::MakeUnique<aura::MusContextFactory>(gpu_service_.get());
     aura_env_->set_context_factory(compositor_context_factory_.get());
-    window_tree_client_ = base::MakeUnique<aura::WindowTreeClient>(this, this);
+    window_tree_client_ = base::MakeUnique<aura::WindowTreeClient>(
+        context()->connector(), this, this);
     aura_env_->SetWindowTreeClient(window_tree_client_.get());
-    window_tree_client_->ConnectAsWindowManager(context()->connector());
+    window_tree_client_->ConnectAsWindowManager();
   }
 
   bool OnConnect(const service_manager::ServiceInfo& remote_info,
                  service_manager::InterfaceRegistry* registry) override {
     return false;
   }
 
   // aura::WindowTreeClientDelegate:
   void OnEmbed(
       std::unique_ptr<aura::WindowTreeHostMus> window_tree_host) override {
@@ skipping 41 matching lines @@
     SetWindowType(window, window_type);
     window->Init(LAYER_NOT_DRAWN);
     window->SetBounds(gfx::Rect(10, 10, 500, 500));
     root_->AddChild(window);
     return window;
   }
   void OnWmClientJankinessChanged(const std::set<aura::Window*>& client_windows,
                                   bool janky) override {
     // Don't care.
   }
+  void OnWmWillCreateDisplay(const display::Display& display) override {}
   void OnWmNewDisplay(std::unique_ptr<aura::WindowTreeHostMus> window_tree_host,
                       const display::Display& display) override {
     // Only handles a single root.
     DCHECK(!root_);
     window_tree_host_ = std::move(window_tree_host);
     root_ = window_tree_host_->window();
     DCHECK(window_manager_client_);
     window_manager_client_->AddActivationParent(root_);
     ui::mojom::FrameDecorationValuesPtr frame_decoration_values =
         ui::mojom::FrameDecorationValues::New();
     frame_decoration_values->max_title_bar_button_width = 0;
     window_manager_client_->SetFrameDecorationValues(
         std::move(frame_decoration_values));
     aura::client::SetFocusClient(root_, &focus_client_);
   }
   void OnWmDisplayRemoved(aura::WindowTreeHostMus* window_tree_host) override {
     DCHECK_EQ(window_tree_host, window_tree_host_.get());
     root_ = nullptr;
     window_tree_host_.reset();
   }
   void OnWmDisplayModified(const display::Display& display) override {}
   void OnWmPerformMoveLoop(aura::Window* window,
                            mojom::MoveLoopSource source,
                            const gfx::Point& cursor_location,
                            const base::Callback<void(bool)>& on_done) override {
     // Don't care.
   }
   void OnWmCancelMoveLoop(aura::Window* window) override {}
+  void OnWmSetClientArea(
+      aura::Window* window,
+      const gfx::Insets& insets,
+      const std::vector<gfx::Rect>& additional_client_areas) override {}
 
   // Dummy screen required to be the screen instance.
   std::unique_ptr<display::test::TestScreen> test_screen_;
 
   std::unique_ptr<aura::Env> aura_env_;
   ::wm::WMState wm_state_;
   aura::PropertyConverter property_converter_;
   aura::test::TestFocusClient focus_client_;
   std::unique_ptr<aura::WindowTreeHostMus> window_tree_host_;
   aura::Window* root_ = nullptr;
   aura::WindowManagerClient* window_manager_client_ = nullptr;
   std::unique_ptr<aura::WindowTreeClient> window_tree_client_;
   std::unique_ptr<ui::GpuService> gpu_service_;
   std::unique_ptr<aura::MusContextFactory> compositor_context_factory_;
 
   bool started_ = false;
 
   DISALLOW_COPY_AND_ASSIGN(TestWM);
 };
 
 }  // namespace test
 }  // namespace ui
 
 MojoResult ServiceMain(MojoHandle service_request_handle) {
   service_manager::ServiceRunner runner(new ui::test::TestWM);
   return runner.Run(service_request_handle);
 }