Download shelf autohides on showing in shell, just same as regular open

chrome/browser/ui/views/download/download_item_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_item_view.h"
 
 #include <algorithm>
 #include <vector>
 
 #include "base/bind.h"
@@ skipping 317 matching lines @@
   SetEnabled(false);
   base::MessageLoop::current()->PostDelayedTask(
       FROM_HERE,
       base::Bind(&DownloadItemView::Reenable, weak_ptr_factory_.GetWeakPtr()),
       base::TimeDelta::FromMilliseconds(kDisabledOnOpenDuration));
 
   // Notify our parent.
   shelf_->OpenedDownload(this);
 }
 
+void DownloadItemView::OnDownloadShown(DownloadItem* download) {
+  shelf_->ShownDownload(this);
+}
+
 // View overrides
 
 // In dangerous mode we have to layout our buttons.
 void DownloadItemView::Layout() {
   if (IsShowingWarningDialog()) {
     BodyImageSet* body_image_set =
         (mode_ == DANGEROUS_MODE) ? &dangerous_mode_body_image_set_ :
             &malicious_mode_body_image_set_;
     int x = kLeftPadding + body_image_set->top_left->width() +
         warning_icon_->width() + kLabelPadding;
@@ skipping 995 matching lines @@
 void DownloadItemView::AnimateStateTransition(State from, State to,
                                               gfx::SlideAnimation* animation) {
   if (from == NORMAL && to == HOT) {
     animation->Show();
   } else if (from == HOT && to == NORMAL) {
     animation->Hide();
   } else if (from != to) {
     animation->Reset((to == HOT) ? 1.0 : 0.0);
   }
 }