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

ui/base/win/foreground_helper.h

Index: ui/base/win/foreground_helper.h
diff --git a/ui/base/win/foreground_helper.h b/ui/base/win/foreground_helper.h
index 7fc1834dddc1ab9914ecbc25418f8c5510dab8ca..e8101a05b5fc5dc3d68fe0afd13576e7662801c2 100644
--- a/ui/base/win/foreground_helper.h
+++ b/ui/base/win/foreground_helper.h
@@ -6,7 +6,7 @@
 #define UI_BASE_WIN_FOREGROUND_HELPER_H_
 
 #include "base/logging.h"
-#include "ui/base/win/window_impl.h"
+#include "ui/gfx/win/window_impl.h"
 
 namespace ui {
 
@@ -17,7 +17,7 @@ namespace ui {
 // to be capable of moving to the foreground.
 //
 // This is probably leveraging a windows bug.
-class UI_EXPORT ForegroundHelper : public WindowImpl {
+class UI_EXPORT ForegroundHelper : public gfx::WindowImpl {
  public:
   ForegroundHelper() : window_(NULL) { }