Make a pure mojo::View version of the aura::Window FocusController.

mojo/services/window_manager/native_viewport_event_dispatcher_impl.h

Index: mojo/services/window_manager/native_viewport_event_dispatcher_impl.h
diff --git a/mojo/services/window_manager/native_viewport_event_dispatcher_impl.h b/mojo/services/window_manager/native_viewport_event_dispatcher_impl.h
index 2ef0f746f7be798018e136f5adba2d1e42557002..1bcf20d0f67ac8cf5e198c5bcc054afa966c75c7 100644
--- a/mojo/services/window_manager/native_viewport_event_dispatcher_impl.h
+++ b/mojo/services/window_manager/native_viewport_event_dispatcher_impl.h
@@ -7,18 +7,23 @@
 
 #include "base/basictypes.h"
 #include "mojo/services/public/interfaces/native_viewport/native_viewport.mojom.h"
+#include "ui/events/event_source.h"
 
 namespace mojo {
 
 class WindowManagerApp;
 
 class NativeViewportEventDispatcherImpl
-    : public InterfaceImpl<NativeViewportEventDispatcher> {
+    : public ui::EventSource,
+      public InterfaceImpl<NativeViewportEventDispatcher> {
  public:
   explicit NativeViewportEventDispatcherImpl(WindowManagerApp* app);
   ~NativeViewportEventDispatcherImpl() override;
 
  private:
+  // ui::EventSource:
+  ui::EventProcessor* GetEventProcessor() override;
+
   // NativeViewportEventDispatcher:
   void OnEvent(mojo::EventPtr event,
                const mojo::Callback<void()>& callback) override;