aura: Use Layer::SetShowPaintedContent to stop showing external content

content/browser/aura/reflector_impl.cc

 // Copyright (c) 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 "content/browser/aura/reflector_impl.h"
 
 #include "base/bind.h"
 #include "base/location.h"
 #include "content/browser/aura/browser_compositor_output_surface.h"
 #include "content/common/gpu/client/gl_helper.h"
@@ skipping 80 matching lines @@
       new GLHelper(output_surface->context_provider()->Context3d()));
   output_surface->SetReflector(this);
 }
 
 void ReflectorImpl::OnMirroringCompositorResized() {
   mirroring_compositor_->ScheduleFullRedraw();
 }
 
 void ReflectorImpl::OnLostResources() {
   shared_texture_ = NULL;
-  mirroring_layer_->SetExternalTexture(NULL);
+  mirroring_layer_->SetShowPaintedContent();
 }
 
 void ReflectorImpl::OnReshape(gfx::Size size) {
   if (texture_size_ == size)
     return;
   texture_size_ = size;
   DCHECK(texture_id_);
   gl_helper_->ResizeTexture(texture_id_, size);
   main_message_loop_->PostTask(
       FROM_HERE,
@@ skipping 60 matching lines @@
   int y = size.height() - rect.y() - rect.height();
   gfx::Rect new_rect(rect.x(), y, rect.width(), rect.height());
   mirroring_layer_->SchedulePaint(new_rect);
 }
 
 void ReflectorImpl::FullRedrawContentOnMainThread() {
   mirrored_compositor_->ScheduleFullRedraw();
 }
 
 }  // namespace content