App Menu Crash Fix

chrome/browser/ui/views/toolbar/app_menu_button.cc

 // 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.
 
 #include "chrome/browser/ui/views/toolbar/app_menu_button.h"
 
 #include "base/command_line.h"
 #include "base/location.h"
 #include "base/memory/ptr_util.h"
 #include "base/metrics/histogram_macros.h"
@@ skipping 91 matching lines @@
   menu_->RunMenu(this);
 
   if (!for_drop) {
     // Record the time-to-action for the menu. We don't record in the case of a
     // drag-and-drop command because menus opened for drag-and-drop don't block
     // the message loop.
     UMA_HISTOGRAM_TIMES("Toolbar.AppMenuTimeToAction",
                         base::TimeTicks::Now() - menu_open_time);
   }
 
-  if (severity_ != AppMenuIconController::Severity::NONE)
+  if (animation_ && severity_ != AppMenuIconController::Severity::NONE)
     animation_->StartAnimation();
 }
 
 void AppMenuButton::CloseMenu() {
   if (menu_)
     menu_->CloseMenu();
   menu_.reset();
 }
 
 bool AppMenuButton::IsMenuShowing() const {
@@ skipping 163 matching lines @@
   return ui::DragDropTypes::DRAG_MOVE;
 }
 
 void AppMenuButton::OnDragExited() {
   weak_factory_.InvalidateWeakPtrs();
 }
 
 int AppMenuButton::OnPerformDrop(const ui::DropTargetEvent& event) {
   return ui::DragDropTypes::DRAG_MOVE;
 }