Remove --disable-core-animation flag

chrome/browser/ui/cocoa/fullscreen_mode_controller.mm

 // Copyright 2013 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/fullscreen_mode_controller.h"
 
 #import "chrome/browser/ui/cocoa/browser_window_controller.h"
 #import "chrome/browser/ui/cocoa/browser_window_controller_private.h"
 #import "chrome/browser/ui/cocoa/fast_resize_view.h"
 
@@ skipping 121 matching lines @@
     return;
 
   [self startAnimationToState:kFullscreenToolbarOnly];
 }
 
 - (void)startAnimationToState:(FullscreenToolbarState)state {
   DCHECK_NE(currentState_, state);
 
   destinationState_ = state;
 
-  // Turn on fast resize mode to ensure a smooth web contents animation.
-  // TODO(rsesek): This makes the animation jump at the end.
-  [[controller_ tabContentArea] setFastResizeMode:YES];
-
   animation_.reset([[FullscreenModeDropDownAnimation alloc]
       initWithFullscreenModeController:self]);
   [animation_ startAnimation];
 }
 
 - (void)setMenuBarRevealProgress:(CGFloat)progress {
   menuBarRevealFraction_ = progress;
 
   // If an animation is not running, then -layoutSubviews will not be called
   // for each tick of the menu bar reveal. Do that manually.
   // TODO(rsesek): This is kind of hacky and janky.
   if (!animation_)
     [controller_ layoutSubviews];
 }
 
 - (void)setRevealAnimationProgress:(NSAnimationProgress)progress {
   // When hiding the tabstrip, invert the fraction.
   if (destinationState_ == kFullscreenToolbarOnly)
     progress = 1.0 - progress;
   [controller_ setFloatingBarShownFraction:progress];
 }
 
 - (void)animationDidEnd:(NSAnimation*)animation {
   DCHECK_EQ(animation_.get(), animation);
 
   currentState_ = destinationState_;
 
   [animation_ setDelegate:nil];
   animation_.reset();
-
-  [[controller_ tabContentArea] setFastResizeMode:NO];
 }
 
 @end