Adds ImmersiveContext and ImmersiveHandlerFactory

ash/shell.h

Index: ash/shell.h
diff --git a/ash/shell.h b/ash/shell.h
index 251cf77b9e53ab312ecca020bc2126144f4c0809..0cf5210b7f2462f68ffd9da2abb1d2170a9a3b42 100644
--- a/ash/shell.h
+++ b/ash/shell.h
@@ -79,7 +79,6 @@ class AcceleratorControllerDelegateAura;
 class AshNativeCursorManager;
 class AutoclickController;
 class BluetoothNotificationController;
-class CaptureController;
 class DesktopBackgroundController;
 class DisplayChangeObserver;
 class DisplayColorManager;
@@ -94,6 +93,8 @@ class EventTransformationHandler;
 class FirstRunHelper;
 class GPUSupport;
 class HighContrastController;
+class ImmersiveContextAsh;
+class ImmersiveHandlerFactoryAsh;
 class LinkHandlerModelFactory;
 class LocaleNotificationController;
 class LockStateController;
@@ -600,6 +601,9 @@ class ASH_EXPORT Shell : public SystemModalContainerEventFilterDelegate,
   // Injected content::GPUDataManager support.
   std::unique_ptr<GPUSupport> gpu_support_;
 
+  std::unique_ptr<ImmersiveContextAsh> immersive_context_;
+  std::unique_ptr<ImmersiveHandlerFactoryAsh> immersive_handler_factory_;
+
   base::SequencedWorkerPool* blocking_pool_;
 
   bool in_mus_ = false;