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

chrome/browser/ui/cocoa/browser_window_controller_private.mm

 // 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 "chrome/browser/ui/cocoa/browser_window_controller_private.h"
 
 #include <cmath>
 
 #import "base/auto_reset.h"
 #include "base/command_line.h"
@@ skipping 592 matching lines @@
 
   NSWindow* window = [self window];
   savedRegularWindowFrame_ = [window frame];
 
   enteringAppKitFullscreen_ = YES;
   enteringAppKitFullscreenOnPrimaryScreen_ =
       [[[self window] screen] isEqual:[[NSScreen screens] firstObject]];
 
   [self setSheetHiddenForFullscreenTransition:YES];
   [self adjustUIForEnteringFullscreen];
+  browser_->WindowFullscreenStateWillChange();
 }
 
 - (void)windowDidEnterFullScreen:(NSNotification*)notification {
   [tabStripController_ setVisualEffectsDisabledForFullscreen:YES];
 
   // In Yosemite, some combination of the titlebar and toolbar always show in
   // full-screen mode. We do not want either to show. Search for the window that
   // contains the views, and hide it. There is no need to ever unhide the view.
   // http://crbug.com/380235
   if (base::mac::IsAtLeastOS10_10()) {
@@ skipping 70 matching lines @@
   // Like windowWillEnterFullScreen, if we use custom animations,
   // adjustUIForExitingFullscreen should be called after the layout resizes in
   // startCustomAnimationToExitFullScreenWithDuration.
   if (isUsingCustomAnimation_) {
     blockLayoutSubviews_ = YES;
     [self.chromeContentView setAutoresizesSubviews:NO];
     [self setSheetHiddenForFullscreenTransition:YES];
   } else {
     [self adjustUIForExitingFullscreen];
   }
+  browser_->WindowFullscreenStateWillChange();
 }
 
 - (void)windowDidExitFullScreen:(NSNotification*)notification {
   DCHECK(exitingAppKitFullscreen_);
 
   // If the custom transition isn't complete, then just set the flag and
   // return. Once the transition is completed, windowDidExitFullscreen will
   // be called again.
   if (isUsingCustomAnimation_ &&
       ![fullscreenTransition_ isTransitionCompleted]) {
@@ skipping 479 matching lines @@
   if (fullscreenLowPowerCoordinator_)
     fullscreenLowPowerCoordinator_->SetHasActiveSheet(false);
 }
 
 - (void)childWindowsDidChange {
   if (fullscreenLowPowerCoordinator_)
     fullscreenLowPowerCoordinator_->ChildWindowsChanged();
 }
 
 @end  // @implementation BrowserWindowController(Private)