mus: Implement Window Server Capture

components/mus/view_tree_host_impl.h

 // Copyright 2015 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_VIEW_TREE_HOST_IMPL_H_
 #define COMPONENTS_MUS_VIEW_TREE_HOST_IMPL_H_
 
 #include "base/memory/scoped_ptr.h"
 #include "components/mus/display_manager.h"
 #include "components/mus/event_dispatcher.h"
@@ skipping 55 matching lines @@
 
   // Returns the metrics for this viewport.
   const mojo::ViewportMetrics& GetViewportMetrics() const;
 
   ConnectionManager* connection_manager() { return connection_manager_; }
 
   // Returns the root ServerView of this viewport.
   ServerView* root_view() { return root_.get(); }
   const ServerView* root_view() const { return root_.get(); }
 
+  void SetCapture(ServerView* view);
+
   void SetFocusedView(ServerView* view);
   ServerView* GetFocusedView();
   void DestroyFocusController();
 
   void UpdateTextInputState(ServerView* view, const ui::TextInputState& state);
   void SetImeVisibility(ServerView* view, bool visible);
 
   void OnAccelerator(uint32_t accelerator_id, mojo::EventPtr event);
   void DispatchInputEventToView(const ServerView* target, mojo::EventPtr event);
 
   // ViewTreeHost:
   void SetSize(mojo::SizePtr size) override;
   void SetTitle(const mojo::String& title) override;
   void AddAccelerator(uint32_t id,
                       mojo::KeyboardCode keyboard_code,
                       mojo::EventFlags flags) override;
   void RemoveAccelerator(uint32_t id) override;
 
  private:
   void OnClientClosed();
 
   // DisplayManagerDelegate:
   ServerView* GetRootView() override;
   void OnEvent(mojo::EventPtr event) override;
+  void OnLostCapture() override;
   void OnDisplayClosed() override;
   void OnViewportMetricsChanged(
       const mojo::ViewportMetrics& old_metrics,
       const mojo::ViewportMetrics& new_metrics) override;
 
   // FocusControllerDelegate:
   void OnFocusChanged(ServerView* old_focused_view,
                       ServerView* new_focused_view) override;
 
   ViewTreeHostDelegate* delegate_;
   ConnectionManager* const connection_manager_;
   mojo::ViewTreeHostClientPtr client_;
   EventDispatcher event_dispatcher_;
   scoped_ptr<ServerView> root_;
   scoped_ptr<DisplayManager> display_manager_;
   scoped_ptr<FocusController> focus_controller_;
+  ServerView* captured_view_;
 
   DISALLOW_COPY_AND_ASSIGN(ViewTreeHostImpl);
 };
 
 }  // namespace mus
 
 #endif  // COMPONENTS_MUS_VIEW_TREE_HOST_IMPL_H_