Don't animate the download shelf when entering/exiting fullscreen.

chrome/browser/ui/cocoa/download/download_shelf_controller.h

 // 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.
 
 #import <Cocoa/Cocoa.h>
 
 #include <memory>
 
 #include "base/mac/scoped_nsobject.h"
 #import "chrome/browser/ui/cocoa/has_weak_browser_pointer.h"
@@ skipping 84 matching lines @@
 // Run when the user clicks the close button on the right side of the shelf.
 - (IBAction)handleClose:(id)sender;
 
 // Shows or hides the download shelf based on the value of |show|.
 // |isUserAction| should be YES if the operation is being triggered based on a
 // user action (currently only relevant when hiding the shelf).
 // Note: This is intended to be invoked from DownloadShelfMac. If invoked
 // directly, the shelf visibility state maintained by DownloadShelf and the
 // owning Browser will not be updated.
 - (void)showDownloadShelf:(BOOL)show
-             isUserAction:(BOOL)isUserAction;
+             isUserAction:(BOOL)isUserAction
+                  animate:(BOOL)animate;
 
 // Returns our view cast as an AnimatableView.
 - (AnimatableView*)animatableView;
 
 - (DownloadShelf*)bridge;
 - (BOOL)isVisible;
 
 // Add a new download item to the leftmost position of the download shelf. The
 // item should not have been already added to this shelf.
 - (void)addDownloadItem:(content::DownloadItem*)downloadItem;
 
 // Similar to addDownloadItem above, but adds a DownloadItemController.
 - (void)add:(DownloadItemController*)download;
 
 // Remove a download, possibly via clearing browser data.
 - (void)remove:(DownloadItemController*)download;
 
 // Called by individual item controllers when their downloads are opened.
 - (void)downloadWasOpened:(DownloadItemController*)download;
 
 // Return the height of the download shelf.
 - (float)height;
 
 // Re-layouts all download items based on their current state.
 - (void)layoutItems;
 
 @end