Remove aura::RootWindow instance from LayerAnimator::observers_ when the window is deleted

ui/aura/root_window.cc

 // Copyright (c) 2011 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 "ui/aura/root_window.h"
 
 #include <string>
 #include <vector>
 
 #include "base/bind.h"
@@ skipping 416 matching lines @@
                                          host_->GetSize());
   }
   DCHECK(compositor_.get());
 }
 
 RootWindow::~RootWindow() {
   in_destructor_ = true;
   // Make sure to destroy the compositor before terminating so that state is
   // cleared and we don't hit asserts.
   compositor_ = NULL;
+  // An observer may have been added by an animation on the RootWindow.
+  layer()->GetAnimator()->RemoveObserver(this);
 #ifdef USE_WEBKIT_COMPOSITOR
   if (!ui::Compositor::compositor_factory())
     ui::CompositorCC::Terminate();
 #endif
   if (instance_ == this)
     instance_ = NULL;
 }
 
 void RootWindow::HandleMouseMoved(const MouseEvent& event, Window* target) {
   if (target == mouse_moved_handler_)
@@ skipping 158 matching lines @@
       base::StringToInt(parts[1], &parsed_height) && parsed_height > 0) {
     bounds.set_size(gfx::Size(parsed_width, parsed_height));
   } else if (use_fullscreen_host_window_) {
     bounds = gfx::Rect(RootWindowHost::GetNativeScreenSize());
   }
 
   return bounds;
 }
 
 }  // namespace aura