[Mac] Fullscreen Toolbar Fixes

chrome/browser/ui/cocoa/fullscreen/fullscreen_toolbar_animation_controller.mm

 // Copyright 2016 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/fullscreen_toolbar_animation_controller.h"
 
 #import "chrome/browser/ui/cocoa/fullscreen/fullscreen_toolbar_controller.h"
 
 namespace {
 
@@ skipping 60 matching lines @@
   animation_.Show();
 }
 
 void FullscreenToolbarAnimationController::AnimateToolbarOutIfPossible() {
   if (![owner_ isInFullscreen] || [owner_ mustShowFullscreenToolbar])
     return;
 
   if (animation_.IsClosing())
     return;
 
-  animation_.Reset(animation_start_value_);
+  animation_.Stop();
   animation_.Hide();
 }
 
 CGFloat FullscreenToolbarAnimationController::GetToolbarFractionFromProgress()
     const {
   return animation_.GetCurrentValue();
 }
 
 bool FullscreenToolbarAnimationController::IsAnimationRunning() const {
   return animation_.is_animating();
@@ skipping 12 matching lines @@
   [owner_ updateToolbarLayout];
 }
 
 void FullscreenToolbarAnimationController::AnimationEnded(
     const gfx::Animation* animation) {
   if (animation_.IsShowing() && should_hide_toolbar_after_delay_) {
     hide_toolbar_timer_.Reset();
     should_hide_toolbar_after_delay_ = false;
   }
 }