chromeos: changes how DisplayManagerObservers are notified

services/ui/public/interfaces/window_manager.mojom

 // 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.
 
 module ui.mojom;
 
 import "cc/ipc/frame_sink_id.mojom";
 import "cc/ipc/local_surface_id.mojom";
 import "services/ui/public/interfaces/cursor/cursor.mojom";
 import "services/ui/public/interfaces/event_matcher.mojom";
@@ skipping 262 matching lines @@
   // |automatically_create_display_roots| (see
   // WindowManagerWindowTreeFactory::CreateWindowTree() for details).
   // |local_surface_id| identifies the ID to use to submit CompositorFrames.
   // base::nullopt indicates failure.
   SetDisplayRoot(display.mojom.Display display,
                  WmViewportMetrics viewport_metrics,
                  bool is_primary_display,
                  uint32 window_id) =>
       (cc.mojom.LocalSurfaceId? local_surface_id);
 
+  // Configures the metrics for the displays and notifies observers. This is
+  // only applicable when WindowTree was created with a value of false for
+  // |automatically_create_display_roots|. This *must* be called after any
+  // display related changes to inform observers, for example, after calling
+  // SetDisplayRoot() this must be called to inform observers of the display
+  // changes.
+  SetDisplayConfiguration(array<display.mojom.Display> displays,
+                          array<WmViewportMetrics> viewport_metrics,
+                          int64 primary_display_id) => (bool success);
+
   // The window manager has completed a request with the specific change id.
   WmResponse(uint32 change_id, bool response);
 
   // The window manager has completed a SetBounds request with the specified
   // change id
   WmSetBoundsResponse(uint32 change_id);
 
   // Calls WindowTreeClient::RequestClose() on the embedded app at the
   // specified window.
   WmRequestClose(uint32 window_id);
@@ skipping 22 matching lines @@
   OnWmCreatedTopLevelWindow(uint32 change_id, uint32 window_id);
 
   // See description in WindowManager::OnAccelerator(). |ack_id| is the value
   // that was passed to OnAccelerator(). If the accelerator is a pre-target
   // handler and |event_result| is UNHANDLED, then |properties| is added to
   // the KeyEvent that is dispatched to the client with the focused window.
   OnAcceleratorAck(uint32 ack_id,
                    EventResult event_result,
                    map<string, array<uint8>> properties);
 };