Set is_translucent even when Aero is disabled.

ui/views/widget/widget_hwnd_utils.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/widget_hwnd_utils.h"
 
-#include <dwmapi.h>
-
 #include "base/command_line.h"
 #include "build/build_config.h"
 #include "ui/base/l10n/l10n_util_win.h"
 #include "ui/base/ui_base_switches.h"
 #include "ui/views/widget/widget_delegate.h"
 #include "ui/views/win/hwnd_message_handler.h"
 
 #if defined(OS_WIN)
 #include "ui/base/win/shell.h"
 #endif
@@ skipping 125 matching lines @@
   //    behind it, it must must be created with D3DFMT_A8R8G8B8 in D3D9Ex, or
   //    with DXGI_ALPHA_MODE_PREMULTIPLIED with DirectComposition.
   // 2- When the window is created but before it is presented, call
   //    DwmExtendFrameIntoClientArea passing -1 as the margins so that
   //    it's blended with the content below the window and not just black.
   // 3- To avoid having a window frame and to avoid blurring the contents
   //    behind the window, the window must have WS_POPUP in its style and must
   //    not have not have WM_SIZEBOX, WS_THICKFRAME or WS_CAPTION in its
   //    style.
   //
-  // This doesn't work when Aero is disabled, so disable it in that case.
-  // Software composited windows can continue to use WS_EX_LAYERED.
+  // This doesn't work when Aero is disabled, but leave the flag on so
+  // software composited windows can continue to use WS_EX_LAYERED. Code that
+  // would create translucent hardware-composited windows should do something
+  // else instead.
   bool is_translucent =
-      (params.opacity == Widget::InitParams::TRANSLUCENT_WINDOW &&
-       (ui::win::IsAeroGlassEnabled() || params.force_software_compositing));
+      (params.opacity == Widget::InitParams::TRANSLUCENT_WINDOW);
 
   CalculateWindowStylesFromInitParams(params, widget_delegate,
                                       native_widget_delegate, is_translucent,
                                       &style, &ex_style, &class_style);
   handler->set_is_translucent(is_translucent);
   handler->set_initial_class_style(class_style);
   handler->set_window_style(handler->window_style() | style);
   handler->set_window_ex_style(handler->window_ex_style() | ex_style);
 }
 
 }  // namespace views