Add PlatformScreenDelegate and start implementation.

services/ui/ws/test_utils.h

 // 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.
 
 #ifndef SERVICES_UI_WS_TEST_UTILS_H_
 #define SERVICES_UI_WS_TEST_UTILS_H_
 
 #include <stdint.h>
 
 #include <memory>
@@ skipping 469 matching lines @@
   // WindowServerDelegate:
   void OnNoMoreDisplays() override;
   std::unique_ptr<WindowTreeBinding> CreateWindowTreeBinding(
       BindingType type,
       ws::WindowServer* window_server,
       ws::WindowTree* tree,
       mojom::WindowTreeRequest* tree_request,
       mojom::WindowTreeClientPtr* client) override;
   void CreateDefaultDisplays() override;
   bool IsTestConfig() const override;
+  void UpdateTouchTransforms() override {}
 
  private:
   // If CreateDefaultDisplays() this is the number of Displays that are
   // created. The default is 0, which results in a DCHECK.
   int num_displays_to_create_ = 0;
   WindowServer* window_server_ = nullptr;
   bool got_on_no_more_displays_ = false;
   // All TestWindowTreeBinding objects created via CreateWindowTreeBinding.
   // These are owned by the corresponding WindowTree.
   std::vector<TestWindowTreeBinding*> bindings_;
@@ skipping 75 matching lines @@
 ServerWindow* NewWindowInTree(WindowTree* tree, ClientWindowId* client_id);
 ServerWindow* NewWindowInTreeWithParent(WindowTree* tree,
                                         ServerWindow* parent,
                                         ClientWindowId* client_id);
 
 }  // namespace test
 }  // namespace ws
 }  // namespace ui
 
 #endif  // SERVICES_UI_WS_TEST_UTILS_H_