Move a bunch of windows stuff from ui/base/win to ui/gfx/win

ui/aura/root_window_host_win.h

Index: ui/aura/root_window_host_win.h
diff --git a/ui/aura/root_window_host_win.h b/ui/aura/root_window_host_win.h
index e2a60ddf7380bb118582aeb92f3d23b514b41afa..42c8ada89ca5045ada696fa371d06816aa6ed12e 100644
--- a/ui/aura/root_window_host_win.h
+++ b/ui/aura/root_window_host_win.h
@@ -8,11 +8,11 @@
 #include "base/compiler_specific.h"
 #include "ui/aura/root_window_host.h"
 #include "ui/base/ui_export.h"
-#include "ui/base/win/window_impl.h"
+#include "ui/gfx/win/window_impl.h"
 
 namespace aura {
 
-class RootWindowHostWin : public RootWindowHost, public ui::WindowImpl {
+class RootWindowHostWin : public RootWindowHost, public gfx::WindowImpl {
  public:
   RootWindowHostWin(const gfx::Rect& bounds);
   virtual ~RootWindowHostWin();