Refactor: remove SetDisplayWorkAreaInsets calls.

ash/shell.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/shell.h"
 
 #include <algorithm>
 #include <string>
 #include <utility>
 
@@ skipping 331 matching lines @@
   // Use translucent-style window frames for dialogs.
   return new CustomFrameViewAsh(widget);
 }
 
 void Shell::SetDisplayWorkAreaInsets(Window* contains,
                                      const gfx::Insets& insets) {
   if (!window_tree_host_manager_->UpdateWorkAreaOfDisplayNearestWindow(
           contains, insets)) {
     return;
   }
-  FOR_EACH_OBSERVER(ShellObserver, *wm_shell_->shell_observers(),
-                    OnDisplayWorkAreaInsetsChanged());
 }
 
 void Shell::OnLoginStateChanged(LoginStatus status) {
   FOR_EACH_OBSERVER(ShellObserver, *wm_shell_->shell_observers(),
                     OnLoginStateChanged(status));
 }
 
 void Shell::OnLoginUserProfilePrepared() {
   CreateShelf();
   CreateKeyboard();
@@ skipping 811 matching lines @@
 
 void Shell::OnWindowActivated(
     aura::client::ActivationChangeObserver::ActivationReason reason,
     aura::Window* gained_active,
     aura::Window* lost_active) {
   if (gained_active)
     target_root_window_ = gained_active->GetRootWindow();
 }
 
 }  // namespace ash