chromeos: changes how DisplayManagerObservers are notified

ui/aura/mus/window_tree_client.h

 // Copyright 2014 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 UI_AURA_MUS_WINDOW_TREE_CLIENT_H_
 #define UI_AURA_MUS_WINDOW_TREE_CLIENT_H_
 
 #include <stdint.h>
 
 #include <map>
@@ skipping 459 matching lines @@
   void RemoveActivationParent(Window* window) override;
   void ActivateNextWindow() override;
   void SetExtendedHitArea(Window* window, const gfx::Insets& hit_area) override;
   void LockCursor() override;
   void UnlockCursor() override;
   void SetCursorVisible(bool visible) override;
   void SetGlobalOverrideCursor(base::Optional<ui::CursorData> cursor) override;
   void RequestClose(Window* window) override;
   bool WaitForInitialDisplays() override;
   WindowTreeHostMusInitParams CreateInitParamsForNewDisplay() override;
+  void SetDisplayConfiguration(
+      const std::vector<display::Display>& displays,
+      std::vector<ui::mojom::WmViewportMetricsPtr> viewport_metrics,
+      int64_t primary_display_id) override;
 
   // Overriden from WindowTreeHostMusDelegate:
   void OnWindowTreeHostBoundsWillChange(WindowTreeHostMus* window_tree_host,
                                         const gfx::Rect& bounds) override;
   void OnWindowTreeHostClientAreaWillChange(
       WindowTreeHostMus* window_tree_host,
       const gfx::Insets& client_area,
       const std::vector<gfx::Rect>& additional_client_areas) override;
   void OnWindowTreeHostHitTestMaskWillChange(
       WindowTreeHostMus* window_tree_host,
@@ skipping 149 matching lines @@
   bool in_shutdown_ = false;
 
   base::WeakPtrFactory<WindowTreeClient> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(WindowTreeClient);
 };
 
 }  // namespace aura
 
 #endif  // UI_AURA_MUS_WINDOW_TREE_CLIENT_H_