[Win] Update HWND max size if either width or height is set.

ui/views/win/hwnd_message_handler.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/views/win/hwnd_message_handler.h"
 
 #include <dwmapi.h>
 #include <oleacc.h>
 #include <shellapi.h>
 #include <wtsapi32.h>
@@ skipping 1413 matching lines @@
 
   // Add the native frame border size to the minimum and maximum size if the
   // view reports its size as the client size.
   if (delegate_->WidgetSizeIsClientSize()) {
     RECT client_rect, window_rect;
     GetClientRect(hwnd(), &client_rect);
     GetWindowRect(hwnd(), &window_rect);
     CR_DEFLATE_RECT(&window_rect, &client_rect);
     min_window_size.Enlarge(window_rect.right - window_rect.left,
                             window_rect.bottom - window_rect.top);
-    if (!max_window_size.IsEmpty()) {
-      max_window_size.Enlarge(window_rect.right - window_rect.left,
-                              window_rect.bottom - window_rect.top);
-    }
+    // Either axis may be zero, so enlarge them independently.
+    if (max_window_size.width())
+      max_window_size.Enlarge(window_rect.right - window_rect.left, 0);
+    if (max_window_size.height())
+      max_window_size.Enlarge(0, window_rect.bottom - window_rect.top);
   }
   minmax_info->ptMinTrackSize.x = min_window_size.width();
   minmax_info->ptMinTrackSize.y = min_window_size.height();
   if (max_window_size.width() || max_window_size.height()) {
     if (!max_window_size.width())
       max_window_size.set_width(GetSystemMetrics(SM_CXMAXTRACK));
     if (!max_window_size.height())
       max_window_size.set_height(GetSystemMetrics(SM_CYMAXTRACK));
     minmax_info->ptMaxTrackSize.x = max_window_size.width();
     minmax_info->ptMaxTrackSize.y = max_window_size.height();
@@ skipping 1044 matching lines @@
     SetWindowPos(hwnd(), NULL, 0, 0, 0, 0, flags | SWP_HIDEWINDOW);
     SetWindowPos(hwnd(), NULL, 0, 0, 0, 0, flags | SWP_SHOWWINDOW);
   }
   // WM_DWMCOMPOSITIONCHANGED is only sent to top level windows, however we want
   // to notify our children too, since we can have MDI child windows who need to
   // update their appearance.
   EnumChildWindows(hwnd(), &SendDwmCompositionChanged, NULL);
 }
 
 }  // namespace views