CrOS Tablet Window management - Split Screen part I

ash/wm/workspace/backdrop_controller.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 ASH_WM_WORKSPACE_WORKSPACE_BACKDROP_DELEGATE_IMPL_H_
 #define ASH_WM_WORKSPACE_WORKSPACE_BACKDROP_DELEGATE_IMPL_H_
 
 #include <memory>
 
 #include "ash/shell_observer.h"
@@ skipping 45 matching lines @@
 
   void SetBackdropDelegate(std::unique_ptr<BackdropDelegate> delegate);
 
   // Update the visibility of, and restack the backdrop relative to
   // the other windows in the container.
   void UpdateBackdrop();
 
   // ShellObserver:
   void OnOverviewModeStarting() override;
   void OnOverviewModeEnded() override;
+  void OnSplitViewModeStarting() override;
+  void OnSplitViewModeEnded() override;
 
   // AccessibilityObserver:
   void OnAccessibilityModeChanged(
       AccessibilityNotificationVisibility notify) override;
 
  private:
   friend class test::WorkspaceControllerTestApi;
 
   void EnsureBackdropWidget();
 
@@ skipping 31 matching lines @@
   // True to temporarily hide the backdrop. Used in
   // overview mode.
   bool force_hidden_ = false;
 
   DISALLOW_COPY_AND_ASSIGN(BackdropController);
 };
 
 }  // namespace ash
 
 #endif  // ASH_WM_WORKSPACE_WORKSPACE_BACKDROP_DELEGATE_IMPL_H_