Move UI-relevant Windows files to ui/base.

chrome/browser/process_singleton_win.cc

Index: chrome/browser/process_singleton_win.cc
===================================================================
--- chrome/browser/process_singleton_win.cc	(revision 71828)
+++ chrome/browser/process_singleton_win.cc	(working copy)
@@ -5,7 +5,6 @@
 #include "chrome/browser/process_singleton.h"
 
 #include "app/l10n_util.h"
-#include "app/win/hwnd_util.h"
 #include "base/base_paths.h"
 #include "base/command_line.h"
 #include "base/file_path.h"
@@ -25,6 +24,7 @@
 #include "chrome/common/result_codes.h"
 #include "grit/chromium_strings.h"
 #include "grit/generated_resources.h"
+#include "ui/base/win/hwnd_util.h"
 
 namespace {
 
@@ -195,7 +195,7 @@
                          0, 0, 0, 0, 0, HWND_MESSAGE, 0, hinst, 0);
   DCHECK(window_);
 
-  app::win::SetWindowUserData(window_, this);
+  ui::SetWindowUserData(window_, this);
   return true;
 }