Have Notifications appear over docked windows

ash/shelf/shelf_layout_manager.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/shelf/shelf_layout_manager.h"
 
 #include <algorithm>
 #include <cmath>
 #include <cstring>
 #include <string>
@@ skipping 1101 matching lines @@
   // window.
   if (session_state_delegate->IsUserSessionBlocked() &&
       keyboard_is_about_to_hide) {
     Shell::GetInstance()->SetDisplayWorkAreaInsets(root_window_, gfx::Insets());
   }
 }
 
 void ShelfLayoutManager::OnDockBoundsChanging(
     const gfx::Rect& dock_bounds,
     DockedWindowLayoutManagerObserver::Reason reason) {
-  // Skip shelf layout in case docked notification originates from this class.
-  if (reason == DISPLAY_INSETS_CHANGED)
-    return;
   if (dock_bounds_ != dock_bounds) {
     dock_bounds_ = dock_bounds;
+    // Skip shelf layout in case docked notification originates from this class.
+    if (reason == DISPLAY_INSETS_CHANGED)
+      return;
     OnWindowResized();
     UpdateVisibilityState();
     UpdateShelfBackground(BACKGROUND_CHANGE_ANIMATE);
   }
 }
 
 void ShelfLayoutManager::OnLockStateEvent(LockStateObserver::EventType event) {
   if (event == EVENT_LOCK_ANIMATION_STARTED) {
     // Enter the screen locked state and update the visibility to avoid an odd
     // animation when transitioning the orientation from L/R to bottom.
@@ skipping 37 matching lines @@
     return false;
   }
   if (session_state_delegate->IsUserSessionBlocked() ||
       state_.is_adding_user_screen) {
     return true;
   }
   return false;
 }
 
 }  // namespace ash