Fix regression where the active window header was not used for apps on CrOS

ui/views/widget/desktop_aura/desktop_native_widget_aura.cc

 // 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.
 
 #include "ui/views/widget/desktop_aura/desktop_native_widget_aura.h"
 
 #include "base/bind.h"
 #include "base/debug/trace_event.h"
 #include "ui/aura/client/activation_client.h"
 #include "ui/aura/client/aura_constants.h"
@@ skipping 973 matching lines @@
   return can_activate_ && native_widget_delegate_->CanActivate();
 }
 
 ////////////////////////////////////////////////////////////////////////////////
 // DesktopNativeWidgetAura, aura::client::ActivationChangeObserver
 //    implementation:
 
 void DesktopNativeWidgetAura::OnWindowActivated(aura::Window* gained_active,
                                                 aura::Window* lost_active) {
   DCHECK(content_window_ == gained_active || content_window_ == lost_active);
-  if ((content_window_ == gained_active || content_window_ == lost_active) &&
-      IsVisible() && GetWidget()->non_client_view()) {
-    GetWidget()->non_client_view()->SchedulePaint();
-  }
   if (gained_active == content_window_ && restore_focus_on_activate_) {
     restore_focus_on_activate_ = false;
     GetWidget()->GetFocusManager()->RestoreFocusedView();
   } else if (lost_active == content_window_ && GetWidget()->HasFocusManager()) {
     DCHECK(!restore_focus_on_activate_);
     restore_focus_on_activate_ = true;
     // Pass in false so that ClearNativeFocus() isn't invoked.
     GetWidget()->GetFocusManager()->StoreFocusedView(false);
   }
 }
@@ skipping 108 matching lines @@
   input_method_event_filter_->SetInputMethodPropertyInRootWindow(
       root_window_->window());
   root_window_event_filter_->AddHandler(input_method_event_filter_.get());
 }
 
 void DesktopNativeWidgetAura::UpdateWindowTransparency() {
   content_window_->SetTransparent(ShouldUseNativeFrame());
 }
 
 }  // namespace views