Remove unused ash::SHELF_ALIGNMENT_TOP

ash/shelf/shelf_tooltip_manager.cc

 // Copyright 2013 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_tooltip_manager.h"
 
 #include "ash/shelf/shelf.h"
 #include "ash/shelf/shelf_layout_manager.h"
 #include "ash/shelf/shelf_view.h"
 #include "ash/shell.h"
@@ skipping 129 matching lines @@
     wm::SetWindowVisibilityAnimationTransition(native_view, wm::ANIMATE_NONE);
     Close();
   }
 
   if (shelf_layout_manager_ && !shelf_layout_manager_->IsVisible())
     return;
 
   Shelf* shelf = shelf_view_->shelf();
   views::BubbleBorder::Arrow arrow = shelf->SelectValueForShelfAlignment(
       views::BubbleBorder::BOTTOM_CENTER, views::BubbleBorder::LEFT_CENTER,
-      views::BubbleBorder::RIGHT_CENTER, views::BubbleBorder::TOP_CENTER);
+      views::BubbleBorder::RIGHT_CENTER);
 
   base::string16 text = shelf_view_->GetTitleForView(view);
   bubble_ = new ShelfTooltipBubble(view, arrow, text);
   gfx::NativeView native_view = bubble_->GetWidget()->GetNativeView();
   wm::SetWindowVisibilityAnimationType(
       native_view, wm::WINDOW_VISIBILITY_ANIMATION_TYPE_VERTICAL);
   wm::SetWindowVisibilityAnimationTransition(native_view, wm::ANIMATE_HIDE);
   bubble_->GetWidget()->Show();
 }
 
@@ skipping 58 matching lines @@
     // AutoHide state change happens during an event filter, so immediate close
     // may cause a crash in the HandleMouseEvent() after the filter.  So we just
     // schedule the Close here.
     base::ThreadTaskRunnerHandle::Get()->PostTask(
         FROM_HERE,
         base::Bind(&ShelfTooltipManager::Close, weak_factory_.GetWeakPtr()));
   }
 }
 
 }  // namespace ash