Allow taking screen shot of a non child window which has delegate to paint.

ash/shell.h

 // Copyright (c) 2012 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_SHELL_H_
 #define ASH_SHELL_H_
 
 #include <memory>
 #include <utility>
 #include <vector>
@@ skipping 101 matching lines @@
 class LogoutConfirmationController;
 class MagnificationController;
 class MaximizeModeController;
 class MaximizeModeWindowManager;
 class MediaDelegate;
 class MouseCursorEventFilter;
 class MruWindowTracker;
 class NewWindowDelegate;
 class OverlayEventFilter;
 class PartialMagnificationController;
-class PartialScreenshotController;
 class PointerWatcherDelegate;
 class PowerButtonController;
 class PowerEventObserver;
 class ProjectingObserver;
 class ResizeShadowController;
 class ResolutionNotificationController;
 class RootWindowController;
 class ScopedTargetRootWindow;
 class ScreenAsh;
 class ScreenOrientationController;
+class ScreenshotController;
 class ScreenPositionController;
 class SessionStateDelegate;
 class Shelf;
 class ShelfDelegate;
 class ShelfItemDelegateManager;
 class ShelfModel;
 class ShelfWindowWatcher;
 class ShellDelegate;
 struct ShellInitParams;
 class ShellObserver;
@@ skipping 255 matching lines @@
     return window_tree_host_manager_.get();
   }
 #if defined(OS_CHROMEOS)
   PowerEventObserver* power_event_observer() {
     return power_event_observer_.get();
   }
   TouchTransformerController* touch_transformer_controller() {
     return touch_transformer_controller_.get();
   }
 #endif  // defined(OS_CHROMEOS)
-  PartialScreenshotController* partial_screenshot_controller() {
-    return partial_screenshot_controller_.get();
+  ScreenshotController* screenshot_controller() {
+    return screenshot_controller_.get();
   }
   MouseCursorEventFilter* mouse_cursor_filter() {
     return mouse_cursor_filter_.get();
   }
   EventTransformationHandler* event_transformation_handler() {
     return event_transformation_handler_.get();
   }
   ::wm::CursorManager* cursor_manager() { return cursor_manager_.get(); }
 
   ShellDelegate* delegate() { return delegate_.get(); }
@@ skipping 291 matching lines @@
   std::unique_ptr<WindowTreeHostManager> window_tree_host_manager_;
   std::unique_ptr<HighContrastController> high_contrast_controller_;
   std::unique_ptr<MagnificationController> magnification_controller_;
   std::unique_ptr<PartialMagnificationController>
       partial_magnification_controller_;
   std::unique_ptr<AutoclickController> autoclick_controller_;
   std::unique_ptr<aura::client::FocusClient> focus_client_;
 
   aura::client::ActivationClient* activation_client_;
 
-  std::unique_ptr<PartialScreenshotController> partial_screenshot_controller_;
+  std::unique_ptr<ScreenshotController> screenshot_controller_;
 
   std::unique_ptr<MouseCursorEventFilter> mouse_cursor_filter_;
   std::unique_ptr<ScreenPositionController> screen_position_controller_;
   std::unique_ptr<SystemModalContainerEventFilter> modality_filter_;
   std::unique_ptr<EventClientImpl> event_client_;
   std::unique_ptr<EventTransformationHandler> event_transformation_handler_;
 
   // An event filter that pre-handles key events while the partial
   // screenshot UI or the keyboard overlay is active.
   std::unique_ptr<OverlayEventFilter> overlay_filter_;
@@ skipping 74 matching lines @@
   bool in_mus_ = false;
 
   std::unique_ptr<KeyboardUI> keyboard_ui_;
 
   DISALLOW_COPY_AND_ASSIGN(Shell);
 };
 
 }  // namespace ash
 
 #endif  // ASH_SHELL_H_