mus: Allow embedder to intercept events.

components/mus/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 COMPONENTS_MUS_PUBLIC_CPP_WINDOW_H_
 #define COMPONENTS_MUS_PUBLIC_CPP_WINDOW_H_
 
 #include <stdint.h>
 #include <vector>
 
@@ skipping 192 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);
 
   // Embedding. See window_tree.mojom for details.
-  void Embed(mus::mojom::WindowTreeClientPtr client);
+  void Embed(mus::mojom::WindowTreeClientPtr client, uint32_t flags = 0);
 
   // NOTE: callback is run synchronously if Embed() is not allowed on this
   // Window.
   void Embed(mus::mojom::WindowTreeClientPtr client,
-             const EmbedCallback& callback);
+             const EmbedCallback& callback,
+             uint32_t flags = 0);
 
   // TODO(sky): this API is only applicable to the WindowManager. Move it
   // to a better place.
   void RequestClose();
 
   // Returns an internal name, set by a client app when it creates a window.
   std::string GetName() const;
 
  protected:
   // This class is subclassed only by test classes that provide a public ctor.
@@ skipping 117 matching lines @@
   };
 
   std::map<const void*, Value> prop_map_;
 
   DISALLOW_COPY_AND_ASSIGN(Window);
 };
 
 }  // namespace mus
 
 #endif  // COMPONENTS_MUS_PUBLIC_CPP_WINDOW_H_