Introduce Display Compositor mojo interface. Use InProcessContextProvider.

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 634 matching lines @@
 
  private:
   WindowServerTestHelper ws_test_helper_;
   // TestWindowTreeClient that is used for the WM client. Owned by
   // |window_server_delegate_|
   TestWindowTreeClient* wm_client_ = nullptr;
   // Owned by WindowServer
   TestDisplayBinding* display_binding_ = nullptr;
   // Owned by WindowServer's DisplayManager.
   Display* display_ = nullptr;
-  scoped_refptr<DisplayCompositor> display_compositor_;
 
   DISALLOW_COPY_AND_ASSIGN(WindowEventTargetingHelper);
 };
 
 // -----------------------------------------------------------------------------
 
 // Adds a new WM to |window_server| for |user_id|. Creates
 // WindowManagerWindowTreeFactory and associated WindowTree for the WM.
 void AddWindowManager(WindowServer* window_server, const UserId& user_id);
 
@@ skipping 23 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_