x11: Use opaque window for dnd without composite.

ui/views/widget/desktop_aura/desktop_drag_drop_client_aurax11.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_drag_drop_client_aurax11.h"
 
 #include <stddef.h>
 #include <stdint.h>
 #include <X11/Xatom.h>
 
@@ skipping 1301 matching lines @@
   xev.xclient.data.l[2] = CurrentTime;
   xev.xclient.data.l[3] = None;
   xev.xclient.data.l[4] = None;
   SendXClientEvent(dest_window, &xev);
 }
 
 void DesktopDragDropClientAuraX11::CreateDragWidget(
     const gfx::ImageSkia& image) {
   Widget* widget = new Widget;
   Widget::InitParams params(Widget::InitParams::TYPE_DRAG);
-  params.opacity = Widget::InitParams::TRANSLUCENT_WINDOW;
+  if (ui::IsCompositingManagerPresent())
+    params.opacity = Widget::InitParams::TRANSLUCENT_WINDOW;
+  else
+    params.opacity = Widget::InitParams::OPAQUE_WINDOW;
   params.ownership = Widget::InitParams::WIDGET_OWNS_NATIVE_WIDGET;
   params.accept_events = false;
 
   gfx::Point location = display::Screen::GetScreen()->GetCursorScreenPoint() -
                         drag_widget_offset_;
   params.bounds = gfx::Rect(location, image.size());
   widget->set_focus_on_creation(false);
   widget->set_frame_type(Widget::FRAME_TYPE_FORCE_NATIVE);
   widget->Init(params);
-  widget->SetOpacity(kDragWidgetOpacity);
+  if (params.opacity == Widget::InitParams::TRANSLUCENT_WINDOW)
+    widget->SetOpacity(kDragWidgetOpacity);
   widget->GetNativeWindow()->SetName("DragWindow");
 
   drag_image_size_ = image.size();
   ImageView* image_view = new ImageView();
   image_view->SetImage(image);
   image_view->SetBoundsRect(gfx::Rect(drag_image_size_));
   widget->SetContentsView(image_view);
   widget->Show();
   widget->GetNativeWindow()->layer()->SetFillsBoundsOpaquely(false);
 
@@ skipping 16 matching lines @@
     for (int x = 0; x < in_bitmap->width(); ++x) {
       if (SkColorGetA(in_row[x]) > kMinAlpha)
         return true;
     }
   }
 
   return false;
 }
 
 }  // namespace views