Adds remainder of support for multiple roots to WS

components/mus/public/interfaces/window_tree.mojom

 // 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.
 
 module mus.mojom;
 
 import "components/mus/public/interfaces/compositor_frame.mojom";
 import "components/mus/public/interfaces/cursor.mojom";
 import "components/mus/public/interfaces/input_events.mojom";
 import "components/mus/public/interfaces/mus_constants.mojom";
@@ skipping 75 matching lines @@
   // unique). Additionally the connection id (embedded in |window_id|) must
   // match that of the connection.
   // Errors:
   //   ERROR_CODE_VALUE_IN_USE: a window already exists with the specified id.
   //   ERROR_CODE_ILLEGAL_ARGUMENT: The connection part of |window_id| does not
   //     match the connection id of the client.
   NewWindow(uint32 change_id,
             uint32 window_id,
             map<string, array<uint8>>? properties);
 
+  // Requests the WindowManager to create a new top level window.
+  // TODO(sky): this likely needs context, maybe in |properties|.
+  NewTopLevelWindow(uint32 change_id,
+                    uint32 window_id,
+                    map<string, array<uint8>> properties);
+
   // Deletes a window. This does not recurse. No hierarchy change notifications
   // are sent as a result of this. Only the connection that created the window
   // can delete it.
   DeleteWindow(uint32 change_id, uint32 window_id);
 
   // Sets the specified bounds of the specified window.
   SetWindowBounds(uint32 change_id, uint32 window_id, mojo.Rect bounds);
 
   // Sets the client area of the specified window. The client area is specified
   // by way of insets. Everything outside of the insets, and not in
@@ skipping 253 matching lines @@
 // This interface is only used as an associated interface and is associated
 // with WindowTreeClient.
 interface WindowManagerInternal {
   // When the WindowManagerInternal completes a request it must call back to
   // WindowManagerInternalClient::WmResponse().
   WmSetBounds(uint32 change_id, uint32 window_id, mojo.Rect bounds);
   WmSetProperty(uint32 change_id,
                 uint32 window_id,
                 string name,
                 array<uint8>? value);
+  // Asks the WindowManager to create a new window.
+  WmCreateTopLevelWindow(uint32 change_id,
+                         map<string, array<uint8>> properties);
 };
 
 // This interface is only used as an associated interface and is associated
 // with WindowTree.
 interface WindowManagerInternalClient {
   // The window manager has completed a request with the specific change id.
   WmResponse(uint32 change_id, bool response);
 
   // Calls WindowTreeClient::RequestClose() on the embedded app at the
   // specified window.
   WmRequestClose(uint32 window_id);
+
+  // Response from WmCreateTopLevelWindow() informing the client of the id for
+  // the new window.
+  OnWmCreatedTopLevelWindow(uint32 change_id, uint32 window_id);
 };