Add WM_EVENT_TRUSTED_PIN and WINDOW_STATE_TYPE_TRUSTED_PINNED to Ash.

ash/wm/workspace/workspace_layout_manager_unittest.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/common/wm/workspace/workspace_layout_manager.h"
 
 #include <string>
 #include <utility>
 
 #include "ash/aura/wm_window_aura.h"
@@ skipping 681 matching lines @@
 // Similary, pinned window causes always_on_top_ windows to stack below.
 TEST_F(WorkspaceLayoutManagerSoloTest, PinnedSuspendsAlwaysOnTop) {
   gfx::Rect bounds(100, 100, 200, 200);
   std::unique_ptr<aura::Window> pinned_window(CreateTestWindow(bounds));
   std::unique_ptr<aura::Window> always_on_top_window1(CreateTestWindow(bounds));
   std::unique_ptr<aura::Window> always_on_top_window2(CreateTestWindow(bounds));
   always_on_top_window1->SetProperty(aura::client::kAlwaysOnTopKey, true);
   always_on_top_window2->SetProperty(aura::client::kAlwaysOnTopKey, true);
 
   // Making a window pinned temporarily suspends always on top state.
-  wm::PinWindow(pinned_window.get());
+  wm::PinWindow(pinned_window.get(), /* trusted */ false);
   EXPECT_FALSE(
       always_on_top_window1->GetProperty(aura::client::kAlwaysOnTopKey));
   EXPECT_FALSE(
       always_on_top_window2->GetProperty(aura::client::kAlwaysOnTopKey));
 
   // Adding a new always-on-top window also is affected by pinned mode.
   std::unique_ptr<aura::Window> always_on_top_window3(CreateTestWindow(bounds));
   always_on_top_window3->SetProperty(aura::client::kAlwaysOnTopKey, true);
   EXPECT_FALSE(
       always_on_top_window3->GetProperty(aura::client::kAlwaysOnTopKey));
@@ skipping 596 matching lines @@
   changed_window_bounds.Offset(0, -shift);
   // Window should be shifted up.
   EXPECT_EQ(changed_window_bounds, window->bounds());
 
   kb_controller->HideKeyboard(
       keyboard::KeyboardController::HIDE_REASON_AUTOMATIC);
   EXPECT_EQ(orig_window_bounds, window->bounds());
 }
 
 }  // namespace ash