Linux UI: Add IsVisibleOnAllWorkspaces()

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 697 matching lines @@
                  None);
 
   int new_desktop = 0;
   if (always_visible) {
     new_desktop = kAllDesktops;
   } else {
     if (!ui::GetCurrentDesktop(&new_desktop))
       return;
   }
 
+  workspace_ = base::IntToString(kAllDesktops);
   XEvent xevent;
   memset (&xevent, 0, sizeof (xevent));
   xevent.type = ClientMessage;
   xevent.xclient.window = xwindow_;
   xevent.xclient.message_type = atom_cache_.GetAtom("_NET_WM_DESKTOP");
   xevent.xclient.format = 32;
   xevent.xclient.data.l[0] = new_desktop;
   xevent.xclient.data.l[1] = 0;
   xevent.xclient.data.l[2] = 0;
   xevent.xclient.data.l[3] = 0;
   xevent.xclient.data.l[4] = 0;
   XSendEvent(xdisplay_, x_root_window_, False,
              SubstructureRedirectMask | SubstructureNotifyMask,
              &xevent);
 }
 
+bool DesktopWindowTreeHostX11::IsVisibleOnAllWorkspaces() const {
+  // We don't need a check for _NET_WM_STATE_STICKY because that would specify
+  // that the window remain in a fixed position even if the viewport scrolls.
+  // This is different from the type of workspace that's associated with
+  // _NET_WM_DESKTOP.
+  return GetWorkspace() == base::IntToString(kAllDesktops);
+}
+
 bool DesktopWindowTreeHostX11::SetWindowTitle(const base::string16& title) {
   if (window_title_ == title)
     return false;
   window_title_ = title;
   std::string utf8str = base::UTF16ToUTF8(title);
   XChangeProperty(xdisplay_,
                   xwindow_,
                   atom_cache_.GetAtom("_NET_WM_NAME"),
                   atom_cache_.GetAtom("UTF8_STRING"),
                   8,
@@ skipping 1339 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