Move UI-relevant Windows files to ui/base.

BUG=none
TEST=none
TBR=brettw

Review URL: http://codereview.chromium.org/6254011

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@71854 0039d316-1c4b-4281-b951-d872f2087c98
diff --git a/chrome/browser/process_singleton_win.cc b/chrome/browser/process_singleton_win.cc
index 47e28dd..87c9966 100644
--- a/chrome/browser/process_singleton_win.cc
+++ b/chrome/browser/process_singleton_win.cc
@@ -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;
 }