FrameGenerator should receive SurfaceInfo and use it in frame generation

services/ui/ws/display.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 SERVICES_UI_WS_DISPLAY_H_
 #define SERVICES_UI_WS_DISPLAY_H_
 
 #include <stdint.h>
 
 #include <map>
@@ skipping 125 matching lines @@
 
   void UpdateNativeCursor(mojom::Cursor cursor_id);
 
   // mojom::WindowTreeHost:
   void SetSize(const gfx::Size& size) override;
   void SetTitle(const std::string& title) override;
 
   // Updates the size of display root ServerWindow and WM root ServerWindow(s).
   void OnViewportMetricsChanged(const display::ViewportMetrics& metrics);
 
+  // Returns the root window of the active user.
+  ServerWindow* GetActiveRootWindow();
+
  private:
   friend class test::DisplayTestApi;
 
   using WindowManagerDisplayRootMap =
       std::map<UserId, WindowManagerDisplayRoot*>;
 
   // Inits the necessary state once the display is ready.
   void InitWindowManagerDisplayRoots();
 
   // Creates the set of WindowManagerDisplayRoots from the
   // WindowManagerWindowTreeFactorySet.
   void CreateWindowManagerDisplayRootsFromFactories();
 
   void CreateWindowManagerDisplayRootFromFactory(
       WindowManagerWindowTreeFactory* factory);
 
   // Creates the root ServerWindow for this display, where |size| is in physical
   // pixels.
   void CreateRootWindow(const gfx::Size& size);
 
   // PlatformDisplayDelegate:
   display::Display GetDisplay() override;
   ServerWindow* GetRootWindow() override;
-  ServerWindow* GetActiveRootWindow() override;
   void OnAcceleratedWidgetAvailable() override;
   bool IsInHighContrastMode() override;
   void OnEvent(const ui::Event& event) override;
   void OnNativeCaptureLost() override;
 
   // FocusControllerDelegate:
   bool CanHaveActiveChildren(ServerWindow* window) const override;
 
   // FocusControllerObserver:
   void OnActivationChanged(ServerWindow* old_active_window,
@@ skipping 22 matching lines @@
 
   WindowManagerDisplayRootMap window_manager_display_root_map_;
 
   DISALLOW_COPY_AND_ASSIGN(Display);
 };
 
 }  // namespace ws
 }  // namespace ui
 
 #endif  // SERVICES_UI_WS_DISPLAY_H_