Implement aura::WindowPortMus::CreateCompositorFrameSink()

services/ui/ws/window_tree.cc

 // 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.
 
 #include "services/ui/ws/window_tree.h"
 
 #include <stddef.h>
 
 #include <utility>
 
@@ skipping 943 matching lines @@
       !IsWindowKnown(transient_window, &transient_client_window_id)) {
     return;
   }
   client()->OnTransientWindowRemoved(client_window_id.id,
                                      transient_client_window_id.id);
 }
 
 void WindowTree::ProcessWindowSurfaceChanged(
     ServerWindow* window,
     const cc::SurfaceInfo& surface_info) {
-  ServerWindow* parent_window = window->parent();
-  ClientWindowId client_window_id, parent_client_window_id;
-  if (!IsWindowKnown(window, &client_window_id) ||
-      !IsWindowKnown(parent_window, &parent_client_window_id) ||
-      !created_window_map_.count(parent_window->id())) {
+  ClientWindowId client_window_id;
+  if (!IsWindowKnown(window, &client_window_id))

[sky, 2017/05/26 23:14:18]

This means for embed points you send the change to both the owner and the
embedded window. Is that expected? I would think you would only send it to one
based on who originated the message.

[Peng, 2017/05/30 19:46:27]

For the embed points, we only call this function on parent tree. The function
will not be called on the child tree. So the child tree will not be notified.

     return;
-  }
-
   client()->OnWindowSurfaceChanged(client_window_id.id, surface_info);
 }
 
 void WindowTree::SendToPointerWatcher(const ui::Event& event,
                                       ServerWindow* target_window,
                                       int64_t display_id) {
   if (!EventMatchesPointerWatcher(event))
     return;
 
   ClientWindowId client_window_id;
@@ skipping 1521 matching lines @@
   client()->OnCompleteDrop(client_window_id.id, event_flags, cursor_offset,
                            effect_bitmask, callback);
 }
 
 void WindowTree::PerformOnDragDropDone() {
   client()->OnDragDropDone();
 }
 
 }  // namespace ws
 }  // namespace ui