Couple of changes for client area

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 1149 matching lines @@
 }
 
 bool DesktopWindowTreeHostX11::IsTranslucentWindowOpacitySupported() const {
   return use_argb_visual_;
 }
 
 void DesktopWindowTreeHostX11::SizeConstraintsChanged() {
   UpdateMinAndMaxSize();
 }
 
+bool DesktopWindowTreeHostX11::ShouldUpdateWindowTransparency() const {
+  return true;
+}
+
 ////////////////////////////////////////////////////////////////////////////////
 // DesktopWindowTreeHostX11, aura::WindowTreeHost implementation:
 
 gfx::Transform DesktopWindowTreeHostX11::GetRootTransform() const {
   display::Display display = display::Screen::GetScreen()->GetPrimaryDisplay();
   if (IsVisible()) {
     aura::Window* win = const_cast<aura::Window*>(window());
     display = display::Screen::GetScreen()->GetDisplayNearestWindow(win);
   }
 
@@ skipping 1166 matching lines @@
   if (linux_ui) {
     ui::NativeTheme* native_theme = linux_ui->GetNativeTheme(window);
     if (native_theme)
       return native_theme;
   }
 
   return ui::NativeThemeAura::instance();
 }
 
 }  // namespace views