The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/7578925d7cf03c4e5a721eb757fd7c35490b57a2

commit 7578925d7cf03c4e5a721eb757fd7c35490b57a2
Author: sdy <sdy@chromium.org>
Date: Fri Feb 17 17:25:57 2017

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

On Views platforms, I could just barely perceive the animation, and it
added jank, not smoothness, to the transition. On Mac, the download
shelf animated in/out *after* the fullscreen transition, which was odd
and drew attention to it as it disappeared.

Now, the shelf appears/disappears as part of the transition — so on
Views it doesn't add jank, and on Mac it fades in/out along with the
rest of the window.

As an added bonus, this fixes a bug where windows on Mac grew by the
height of the downloads bar each time you enter/exit fullscreen. It
should also fix a flaky test on 10.9 by adding an option to hide/show
the shelf without animation.

BUG= 29629 , 687447

Review-Url: https://codereview.chromium.org/2688413012
Cr-Commit-Position: refs/heads/master@{#451327}

[modify] https://crrev.com/7578925d7cf03c4e5a721eb757fd7c35490b57a2/chrome/browser/download/download_shelf.cc
[modify] https://crrev.com/7578925d7cf03c4e5a721eb757fd7c35490b57a2/chrome/browser/download/download_shelf.h
[modify] https://crrev.com/7578925d7cf03c4e5a721eb757fd7c35490b57a2/chrome/browser/download/download_shelf_unittest.cc
[modify] https://crrev.com/7578925d7cf03c4e5a721eb757fd7c35490b57a2/chrome/browser/download/test_download_shelf.cc
[modify] https://crrev.com/7578925d7cf03c4e5a721eb757fd7c35490b57a2/chrome/browser/download/test_download_shelf.h
[modify] https://crrev.com/7578925d7cf03c4e5a721eb757fd7c35490b57a2/chrome/browser/ui/browser.cc
[modify] https://crrev.com/7578925d7cf03c4e5a721eb757fd7c35490b57a2/chrome/browser/ui/browser.h
[modify] https://crrev.com/7578925d7cf03c4e5a721eb757fd7c35490b57a2/chrome/browser/ui/cocoa/browser_window_controller_private.mm
[modify] https://crrev.com/7578925d7cf03c4e5a721eb757fd7c35490b57a2/chrome/browser/ui/cocoa/download/download_shelf_controller.h
[modify] https://crrev.com/7578925d7cf03c4e5a721eb757fd7c35490b57a2/chrome/browser/ui/cocoa/download/download_shelf_controller.mm
[modify] https://crrev.com/7578925d7cf03c4e5a721eb757fd7c35490b57a2/chrome/browser/ui/cocoa/download/download_shelf_controller_unittest.mm
[modify] https://crrev.com/7578925d7cf03c4e5a721eb757fd7c35490b57a2/chrome/browser/ui/cocoa/download/download_shelf_mac.h
[modify] https://crrev.com/7578925d7cf03c4e5a721eb757fd7c35490b57a2/chrome/browser/ui/cocoa/download/download_shelf_mac.mm
[modify] https://crrev.com/7578925d7cf03c4e5a721eb757fd7c35490b57a2/chrome/browser/ui/cocoa/download/download_shelf_mac_unittest.mm
[modify] https://crrev.com/7578925d7cf03c4e5a721eb757fd7c35490b57a2/chrome/browser/ui/cocoa/view_id_util_browsertest.mm
[modify] https://crrev.com/7578925d7cf03c4e5a721eb757fd7c35490b57a2/chrome/browser/ui/exclusive_access/fullscreen_controller.cc
[modify] https://crrev.com/7578925d7cf03c4e5a721eb757fd7c35490b57a2/chrome/browser/ui/exclusive_access/fullscreen_controller.h
[modify] https://crrev.com/7578925d7cf03c4e5a721eb757fd7c35490b57a2/chrome/browser/ui/views/download/download_shelf_view.cc
[modify] https://crrev.com/7578925d7cf03c4e5a721eb757fd7c35490b57a2/chrome/browser/ui/views/download/download_shelf_view.h
[modify] https://crrev.com/7578925d7cf03c4e5a721eb757fd7c35490b57a2/chrome/browser/ui/views/frame/browser_view.cc