desktop_window_tree_host_x11.cc: do not return immediately from DesktopWindowTreeHostX11::OnWMState…

ui/views/widget/desktop_aura/desktop_window_tree_host_x11.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/widget/desktop_aura/desktop_window_tree_host_x11.h"
 
 #include <X11/extensions/shape.h>
 #include <X11/extensions/XInput2.h>
 #include <X11/Xatom.h>
 #include <X11/Xregion.h>
@@ skipping 1207 matching lines @@
   }
 
   // Do not request a 0x0 window size. It causes an XError.
   gfx::Size size = requested_size;
   size.SetToMax(gfx::Size(1,1));
   return size;
 }
 
 void DesktopWindowTreeHostX11::OnWMStateUpdated() {
   std::vector< ::Atom> atom_list;
-  if (!ui::GetAtomArrayProperty(xwindow_, "_NET_WM_STATE", &atom_list))
-    return;
+  // Ignore the return value of ui::GetAtomArrayProperty(). Fluxbox removes the
+  // _NET_WM_STATE property when no _NET_WM_STATE atoms are set.
+  ui::GetAtomArrayProperty(xwindow_, "_NET_WM_STATE", &atom_list);
 
   bool was_minimized = IsMinimized();
 
   window_properties_.clear();
   std::copy(atom_list.begin(), atom_list.end(),
             inserter(window_properties_, window_properties_.begin()));
 
   // Propagate the window minimization information to the content window, so
   // the render side can update its visibility properly. OnWMStateUpdated() is
   // called by PropertyNofify event from DispatchEvent() when the browser is
@@ skipping 687 matching lines @@
   if (linux_ui) {
     ui::NativeTheme* native_theme = linux_ui->GetNativeTheme(window);
     if (native_theme)
       return native_theme;
   }
 
   return ui::NativeTheme::instance();
 }
 
 }  // namespace views