The download arrow is not vertically centered and needs to be shifted down by 2 pt.

chrome/browser/ui/views/download/download_shelf_view.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 "chrome/browser/ui/views/download/download_shelf_view.h"
 
 #include <algorithm>
 #include <vector>
 
 #include "base/logging.h"
@@ skipping 234 matching lines @@
   gfx::Size show_all_size = show_all_view_->GetPreferredSize();
   int max_download_x =
       std::max<int>(0, width() - kRightPadding - close_button_size.width() -
                        kCloseAndLinkPadding - show_all_size.width() -
                        kDownloadsTitlePadding - image_size.width() -
                        kDownloadPadding);
   int next_x = show_link_only ? kLeftPadding :
                                 max_download_x + kDownloadPadding;
   // Align vertically with show_all_view_.
   arrow_image_->SetBounds(next_x,
-                          CenterPosition(show_all_size.height(), height()),
+                          CenterPosition(image_size.height(), height()),
                           image_size.width(), image_size.height());
   next_x += image_size.width() + kDownloadsTitlePadding;
   show_all_view_->SetBounds(next_x,
                             CenterPosition(show_all_size.height(), height()),
                             show_all_size.width(),
                             show_all_size.height());
   next_x += show_all_size.width() + kCloseAndLinkPadding;
   // If the window is maximized, we want to expand the hitbox of the close
   // button to the right and bottom to make it easier to click.
   bool is_maximized = browser_->window()->IsMaximized();
@@ skipping 207 matching lines @@
     const DownloadItemView* download_item_view) {
   gfx::Rect bounds = download_item_view->bounds();
 
 #if defined(TOOLKIT_VIEWS)
   bounds.set_height(bounds.height() - 1);
   bounds.Offset(0, 3);
 #endif
 
   return bounds;
 }