Fix ws::Display initialization order.

services/ui/ws/display.h

 // 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.
 
 #ifndef SERVICES_UI_WS_DISPLAY_H_
 #define SERVICES_UI_WS_DISPLAY_H_
 
 #include <stdint.h>
 
 #include <map>
@@ skipping 40 matching lines @@
 //   Display.
 // . without a DisplayBinding. In this mode a WindowManager is automatically
 //   created per user.
 class Display : public PlatformDisplayDelegate,
                 public mojom::WindowTreeHost,
                 public FocusControllerObserver,
                 public FocusControllerDelegate,
                 public UserIdTrackerObserver,
                 public WindowManagerWindowTreeFactorySetObserver {
  public:
-  Display(WindowServer* window_server,
-          const PlatformDisplayInitParams& platform_display_init_params);
+  explicit Display(WindowServer* window_server);
   ~Display() override;
 
-  // Initializes state that depends on the existence of a Display.
-  void Init(std::unique_ptr<DisplayBinding> binding);
+  // Initializes the display root ServerWindow and PlatformDisplay. Adds this to
+  // DisplayManager as a pending display, until accelerated widget is available.
+  void Init(const PlatformDisplayInitParams& init_params,
+            std::unique_ptr<DisplayBinding> binding);
 
   int64_t GetId() const;
 
   DisplayManager* display_manager();
   const DisplayManager* display_manager() const;
 
   PlatformDisplay* platform_display() { return platform_display_.get(); }
 
   // Returns a display::Display corresponding to this ws::Display.
   display::Display ToDisplay() const;
 
+  // Returns the size of the display in physical pixels.
   gfx::Size GetSize() const;
 
   WindowServer* window_server() { return window_server_; }
 
   // Returns the root of the Display. The root's children are the roots
   // of the corresponding WindowManagers.
   ServerWindow* root_window() { return root_.get(); }
   const ServerWindow* root_window() const { return root_.get(); }
 
   // Returns the ServerWindow whose id is |id|. This does not do a search over
@@ skipping 52 matching lines @@
   // Updates the size of display root ServerWindow and WM root ServerWindow(s).
   void OnViewportMetricsChanged(const display::ViewportMetrics& metrics);
 
  private:
   friend class test::DisplayTestApi;
 
   using WindowManagerDisplayRootMap =
       std::map<UserId, WindowManagerDisplayRoot*>;
 
   // Inits the necessary state once the display is ready.
-  void InitWindowManagerDisplayRootsIfNecessary();
+  void InitWindowManagerDisplayRoots();
 
   // Creates the set of WindowManagerDisplayRoots from the
   // WindowManagerWindowTreeFactorySet.
   void CreateWindowManagerDisplayRootsFromFactories();
 
   void CreateWindowManagerDisplayRootFromFactory(
       WindowManagerWindowTreeFactory* factory);
 
   // Creates the root ServerWindow for this display, where |size| is in physical
   // pixels.
   void CreateRootWindow(const gfx::Size& size);
 
   // PlatformDisplayDelegate:
   ServerWindow* GetRootWindow() override;
+  void OnAcceleratedWidgetAvailable() override;
   bool IsInHighContrastMode() override;
   void OnEvent(const ui::Event& event) override;
   void OnNativeCaptureLost() override;
 
   // FocusControllerDelegate:
   bool CanHaveActiveChildren(ServerWindow* window) const override;
 
   // FocusControllerObserver:
   void OnActivationChanged(ServerWindow* old_active_window,
                            ServerWindow* new_active_window) override;
   void OnFocusChanged(FocusControllerChangeSource change_source,
                       ServerWindow* old_focused_window,
                       ServerWindow* new_focused_window) override;
 
   // UserIdTrackerObserver:
   void OnUserIdRemoved(const UserId& id) override;
 
   // WindowManagerWindowTreeFactorySetObserver:
   void OnWindowManagerWindowTreeFactoryReady(
       WindowManagerWindowTreeFactory* factory) override;
 
   std::unique_ptr<DisplayBinding> binding_;
-  // Set once Init() has been called.
-  bool init_called_ = false;
   WindowServer* const window_server_;
   std::unique_ptr<ServerWindow> root_;
   std::unique_ptr<PlatformDisplay> platform_display_;
   std::unique_ptr<FocusController> focus_controller_;
 
   // The last cursor set. Used to track whether we need to change the cursor.
   mojom::Cursor last_cursor_;
 
   ServerWindowTracker activation_parents_;
 
   WindowManagerDisplayRootMap window_manager_display_root_map_;
 
   DISALLOW_COPY_AND_ASSIGN(Display);
 };
 
 }  // namespace ws
 }  // namespace ui
 
 #endif  // SERVICES_UI_WS_DISPLAY_H_