Only Call EnableChildWindowDpiMessage When Window Has A Frame

ui/gfx/win/window_impl.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/gfx/win/window_impl.h"
 
 #include <list>
 
 #include "base/bind.h"
 #include "base/debug/alias.h"
@@ skipping 195 matching lines @@
     height = bounds.height();
   }
 
   ATOM atom = GetWindowClassAtom();
   bool destroyed = false;
   destroyed_ = &destroyed;
   HWND hwnd = CreateWindowEx(window_ex_style_,
                              reinterpret_cast<wchar_t*>(atom), NULL,
                              window_style_, x, y, width, height,
                              parent, NULL, NULL, this);
-  if (hwnd && base::win::IsProcessPerMonitorDpiAware()) {
-    static auto enable_child_window_dpi_message_func = []() {
-      // Derived signature; not available in headers.
-      // This call gets Windows to scale the non-client area when WM_DPICHANGED
-      // is fired.
-      using EnableChildWindowDpiMessagePtr = LRESULT (WINAPI*)(HWND, BOOL);
-      return reinterpret_cast<EnableChildWindowDpiMessagePtr>(
-                 GetProcAddress(GetModuleHandle(L"user32.dll"),
-                                "EnableChildWindowDpiMessage"));
-    }();
-    if (enable_child_window_dpi_message_func)
-      enable_child_window_dpi_message_func(hwnd, TRUE);
-  }
-
   // First nccalcszie (during CreateWindow) for captioned windows is
   // deliberately ignored so force a second one here to get the right
   // non-client set up.
   if (hwnd && (window_style_ & WS_CAPTION)) {
     SetWindowPos(hwnd, NULL, 0, 0, 0, 0,
                  SWP_FRAMECHANGED | SWP_NOMOVE | SWP_NOSIZE |
                  SWP_NOZORDER | SWP_NOACTIVATE | SWP_NOREDRAW);
   }
 
   if (!hwnd_ && GetLastError() == 0) {
@@ skipping 77 matching lines @@
 }
 
 ATOM WindowImpl::GetWindowClassAtom() {
   HICON icon = GetDefaultWindowIcon();
   HICON small_icon = GetSmallWindowIcon();
   ClassInfo class_info(initial_class_style(), icon, small_icon);
   return ClassRegistrar::GetInstance()->RetrieveClassAtom(class_info);
 }
 
 }  // namespace gfx