chromeos: changes how DisplayManagerObservers are notified

ui/aura/mus/window_manager_delegate.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 UI_AURA_MUS_WINDOW_MANAGER_DELEGATE_H_
 #define UI_AURA_MUS_WINDOW_MANAGER_DELEGATE_H_
 
 #include <stdint.h>
 
 #include <map>
@@ skipping 73 matching lines @@
   // not automatically created until the connection to mus has been
   // established.
   virtual bool WaitForInitialDisplays() = 0;
 
   // Used by the window manager to create a new display. This is only useful if
   // the WindowTreeClient was configured not to automatically create displays
   // (see ConnectAsWindowManager()). The caller needs to configure
   // DisplayInitParams on the returned object.
   virtual WindowTreeHostMusInitParams CreateInitParamsForNewDisplay() = 0;
 
+  // Configures the displays. This is used when the window manager manually
+  // configures display roots.
+  virtual void SetDisplayConfiguration(
+      const std::vector<display::Display>& displays,
+      std::vector<ui::mojom::WmViewportMetricsPtr> viewport_metrics,
+      int64_t primary_display_id) = 0;
+
  protected:
   virtual ~WindowManagerClient() {}
 };
 
 // Used by clients implementing a window manager.
 // TODO(sky): this should be called WindowManager, but that's rather confusing
 // currently.
 class AURA_EXPORT WindowManagerDelegate {
  public:
   // Called once to give the delegate access to functions only exposed to
@@ skipping 106 matching lines @@
   // window.
   virtual void OnWmDeactivateWindow(Window* window) = 0;
 
  protected:
   virtual ~WindowManagerDelegate() {}
 };
 
 }  // namespace ui
 
 #endif  // UI_AURA_MUS_WINDOW_MANAGER_DELEGATE_H_