Add WindowPinType property on arua::Window

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 861 matching lines @@
                  atom_cache_.GetAtom("_NET_WM_STATE_MAXIMIZED_HORZ"));
   if (IsMinimized())
     ShowWindowWithState(ui::SHOW_STATE_NORMAL);
 }
 
 void DesktopWindowTreeHostX11::Minimize() {
   ReleaseCapture();
   XIconifyWindow(xdisplay_, xwindow_, 0);
 }
 
+void DesktopWindowTreeHostX11::Pin(bool trusted) {
+  // We only use Pin() for ARC++ window on Chromebook, so we don't need
+  // implement it for X11.
+  NOTIMPLEMENTED();
+}
+
 void DesktopWindowTreeHostX11::Restore() {
   should_maximize_after_map_ = false;
   SetWMSpecState(false,
                  atom_cache_.GetAtom("_NET_WM_STATE_MAXIMIZED_VERT"),
                  atom_cache_.GetAtom("_NET_WM_STATE_MAXIMIZED_HORZ"));
   if (IsMinimized())
     ShowWindowWithState(ui::SHOW_STATE_NORMAL);
 }
 
 bool DesktopWindowTreeHostX11::IsMaximized() const {
   return (HasWMSpecProperty("_NET_WM_STATE_MAXIMIZED_VERT") &&
           HasWMSpecProperty("_NET_WM_STATE_MAXIMIZED_HORZ"));
 }
 
 bool DesktopWindowTreeHostX11::IsMinimized() const {
   return HasWMSpecProperty("_NET_WM_STATE_HIDDEN");
 }
 
+bool DesktopWindowTreeHostX11::IsPinned() const {
+  return false;
+}
+
 bool DesktopWindowTreeHostX11::HasCapture() const {
   return g_current_capture == this;
 }
 
 void DesktopWindowTreeHostX11::SetAlwaysOnTop(bool always_on_top) {
   is_always_on_top_ = always_on_top;
   SetWMSpecState(always_on_top,
                  atom_cache_.GetAtom("_NET_WM_STATE_ABOVE"),
                  None);
 }
@@ skipping 1444 matching lines @@
 
 // static
 DesktopWindowTreeHost* DesktopWindowTreeHost::Create(
     internal::NativeWidgetDelegate* native_widget_delegate,
     DesktopNativeWidgetAura* desktop_native_widget_aura) {
   return new DesktopWindowTreeHostX11(native_widget_delegate,
                                       desktop_native_widget_aura);
 }
 
 }  // namespace views