mus: Disregard windows that explicitly set can_accept_events to be false when sending events.

services/ui/public/cpp/window.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 SERVICES_UI_PUBLIC_CPP_WINDOW_H_
 #define SERVICES_UI_PUBLIC_CPP_WINDOW_H_
 
 #include <stdint.h>
 #include <vector>
 
@@ skipping 191 matching lines @@
 
   bool HasCapture() const;
   void SetCapture();
   void ReleaseCapture();
 
   // Focus. See WindowTreeClient::ClearFocus() to reset focus.
   void SetFocus();
   bool HasFocus() const;
   void SetCanFocus(bool can_focus);
 
+  // Set whether this window accepts events.
+  void SetAcceptEvents(bool accept_events);

[sky, 2016/07/08 20:35:00]

nit: SetCanAcceptEvents.

[riajiang, 2016/07/11 15:48:38]

Done.

+
   // Embedding. See window_tree.mojom for details.
   void Embed(ui::mojom::WindowTreeClientPtr client, uint32_t flags = 0);
 
   // NOTE: callback is run synchronously if Embed() is not allowed on this
   // Window.
   void Embed(ui::mojom::WindowTreeClientPtr client,
              const EmbedCallback& callback,
              uint32_t flags = 0);
 
   // TODO(sky): this API is only applicable to the WindowManager. Move it
@@ skipping 135 matching lines @@
   };
 
   std::map<const void*, Value> prop_map_;
 
   DISALLOW_COPY_AND_ASSIGN(Window);
 };
 
 }  // namespace ui
 
 #endif  // SERVICES_UI_PUBLIC_CPP_WINDOW_H_