[Athena] Fix switching activities by swiping from the right bezel

athena/wm/window_manager_impl.h

Index: athena/wm/window_manager_impl.h
diff --git a/athena/wm/window_manager_impl.h b/athena/wm/window_manager_impl.h
index 6cbad5a06bd323f9702af6a95490a7d0dce8b59c..32e98315460f5b6b7ac78bcfd471d286aadf86dd 100644
--- a/athena/wm/window_manager_impl.h
+++ b/athena/wm/window_manager_impl.h
@@ -5,6 +5,7 @@
 #ifndef ATHENA_WM_WINDOW_MANAGER_IMPL_H_
 #define ATHENA_WM_WINDOW_MANAGER_IMPL_H_
 
+#include "athena/athena_export.h"
 #include "athena/input/public/accelerator_manager.h"
 #include "athena/wm/public/window_manager.h"
 #include "athena/wm/title_drag_controller.h"
@@ -29,15 +30,17 @@ class SplitViewController;
 class WindowListProvider;
 class WindowManagerObserver;
 
-class WindowManagerImpl : public WindowManager,
-                          public WindowOverviewModeDelegate,
-                          public aura::WindowObserver,
-                          public AcceleratorHandler,
-                          public TitleDragControllerDelegate {
+class ATHENA_EXPORT WindowManagerImpl : public WindowManager,
+                                        public WindowOverviewModeDelegate,
+                                        public aura::WindowObserver,
+                                        public AcceleratorHandler,
+                                        public TitleDragControllerDelegate {
  public:
   WindowManagerImpl();
   virtual ~WindowManagerImpl();
 
+  void ToggleSplitView();
+
   // WindowManager:
   virtual void ToggleOverview() OVERRIDE;
   virtual bool IsOverviewModeActive() OVERRIDE;
@@ -54,8 +57,6 @@ class WindowManagerImpl : public WindowManager,
   // Sets whether overview mode is active.
   void SetInOverview(bool active);
 
-  void ToggleSplitview();
-
   void InstallAccelerators();
 
   // WindowManager: