Correct title bar size for HiDPI Windows

ui/base/win/dpi.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "ui/base/win/dpi.h"
 
 #include <windows.h>
 
 #include "base/win/scoped_hdc.h"
 #include "ui/base/layout.h"
@@ skipping 96 matching lines @@
 
 gfx::Size ScreenToDIPSize(const gfx::Size& size_in_pixels) {
   return gfx::ToFlooredSize(
       gfx::ScaleSize(size_in_pixels, 1.0f / GetDeviceScaleFactor()));
 }
 
 gfx::Size DIPToScreenSize(const gfx::Size& dip_size) {
   return gfx::ToFlooredSize(gfx::ScaleSize(dip_size, GetDeviceScaleFactor()));
 }
 
+int GetSystemMetricsInDIP(int metric) {
+  return static_cast<int>(GetSystemMetrics(metric) /
+      GetDeviceScaleFactor() + 0.5);
+}
+
 double GetUndocumentedDPIScale() {
   // TODO(girard): Remove this code when chrome is DPIAware.
   static double scale = -1.0;
   if (scale == -1.0) {
     scale = 1.0;
     if (!IsProcessDPIAwareWrapper()) {
       base::win::RegKey key(HKEY_CURRENT_USER,
                             L"Control Panel\\Desktop\\WindowMetrics",
                             KEY_QUERY_VALUE);
       if (key.Valid()) {
         DWORD value = 0;
         if (key.ReadValueDW(L"AppliedDPI", &value) == ERROR_SUCCESS) {
           scale = static_cast<double>(value) / kDefaultDPIX;
         }
       }
     }
   }
   return scale;
 }
 
 }  // namespace win
 
 }  // namespace ui