mus: Introduce AttachSurface to allow creating Surface prior to OnEmbed

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 11 matching lines @@
 
 namespace gfx {
 class Size;
 }
 
 namespace mus {
 
 class ServiceProviderImpl;
 class WindowObserver;
 class WindowSurface;
+class WindowSurfaceBinding;
 class WindowTreeClientImpl;
 class WindowTreeConnection;
 
 namespace {
 class OrderChangedNotifier;
 }
 
 // Defined in window_property.h (which we do not include)
 template <typename T>
 struct WindowProperty;
@@ skipping 38 matching lines @@
   // A Window is drawn if the Window and all its ancestors are visible and the
   // Window is attached to the root.
   bool IsDrawn() const;
 
   const mojom::ViewportMetrics& viewport_metrics() {
     return *viewport_metrics_;
   }
 
   scoped_ptr<WindowSurface> RequestSurface(mojom::SurfaceType type);
 
+  void AttachSurface(mojom::SurfaceType type,
+                     scoped_ptr<WindowSurfaceBinding> surface_binding);
+
   // The template-ized versions of the following methods rely on the presence
   // of a mojo::TypeConverter<const std::vector<uint8_t>, T>.
   // Sets a shared property on the window which is sent to the window server and
   // shared with other clients that can view this window.
   template <typename T>
   void SetSharedProperty(const std::string& name, const T& data);
   // Gets a shared property set on the window. The property must exist. Call
   // HasSharedProperty() before calling.
   template <typename T>
   T GetSharedProperty(const std::string& name) const;
@@ skipping 189 matching lines @@
   };
 
   std::map<const void*, Value> prop_map_;
 
   MOJO_DISALLOW_COPY_AND_ASSIGN(Window);
 };
 
 }  // namespace mus
 
 #endif  // COMPONENTS_MUS_PUBLIC_CPP_WINDOW_H_