Add WM_EVENT_TRUSTED_PIN and WINDOW_STATE_TYPE_TRUSTED_PINNED to Ash.

ash/wm/window_util.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 "ash/wm/window_util.h"
 
 #include <vector>
 
 #include "ash/aura/wm_window_aura.h"
 #include "ash/common/ash_constants.h"
@@ skipping 44 matching lines @@
 }
 
 bool CanActivateWindow(aura::Window* window) {
   return ::wm::CanActivateWindow(window);
 }
 
 bool IsWindowUserPositionable(aura::Window* window) {
   return GetWindowState(window)->IsUserPositionable();
 }
 
-void PinWindow(aura::Window* window) {
-  wm::WMEvent event(wm::WM_EVENT_PIN);
+void PinWindow(aura::Window* window, bool trusted) {
+  wm::WMEvent event(trusted ? wm::WM_EVENT_TRUSTED_PIN : wm::WM_EVENT_PIN);
   wm::GetWindowState(window)->OnWMEvent(&event);
 }
 
 bool MoveWindowToEventRoot(aura::Window* window, const ui::Event& event) {
   views::View* target = static_cast<views::View*>(event.target());
   if (!target)
     return false;
   aura::Window* target_root =
       target->GetWidget()->GetNativeView()->GetRootWindow();
   if (!target_root || target_root == window->GetRootWindow())
@@ skipping 34 matching lines @@
       if (!container->layout_manager())
         container->SetLayoutManager(new SnapToPixelLayoutManager(container));
     } else {
       InstallSnapLayoutManagerToContainers(container);
     }
   }
 }
 
 }  // namespace wm
 }  // namespace ash