Use active window if on current workspace for fullscreen mode.

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 528 matching lines @@
 void ShelfLayoutManager::OnLockStateChanged(bool locked) {
   // Force the shelf to layout for alignment (bottom if locked, restore
   // the previous alignment otherwise).
   shelf_->SetAlignment(locked ? SHELF_ALIGNMENT_BOTTOM : alignment_);
   UpdateVisibilityState();
   LayoutShelf();
 }
 
 void ShelfLayoutManager::OnWindowActivated(aura::Window* gained_active,
                                            aura::Window* lost_active) {
+  UpdateVisibilityState();
   UpdateAutoHideStateNow();
 }
 
 bool ShelfLayoutManager::IsHorizontalAlignment() const {
   return GetAlignment() == SHELF_ALIGNMENT_BOTTOM ||
          GetAlignment() == SHELF_ALIGNMENT_TOP;
 }
 
 // static
 ShelfLayoutManager* ShelfLayoutManager::ForShelf(aura::Window* window) {
@@ skipping 591 matching lines @@
       return gfx::Insets(0, distance, 0, 0);
     case SHELF_ALIGNMENT_TOP:
       return gfx::Insets(0, 0, distance, 0);
   }
   NOTREACHED();
   return gfx::Insets();
 }
 
 }  // namespace internal
 }  // namespace ash