Fix three causes of blank thumbnails [2nd land]

ui/android/delegated_frame_host_android.cc

 // 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.
 
 #include "ui/android/delegated_frame_host_android.h"
 
 #include "base/bind.h"
 #include "base/logging.h"
 #include "cc/layers/solid_color_layer.h"
 #include "cc/layers/surface_layer.h"
@@ skipping 167 matching lines @@
       !current_frame_->has_transparent_background);
   readback_layer->SetHideLayerAndSubtree(true);
   compositor->AttachLayerForReadback(readback_layer);
   std::unique_ptr<cc::CopyOutputRequest> copy_output_request =
       cc::CopyOutputRequest::CreateRequest(base::Bind(
           &CopyOutputRequestCallback, readback_layer, result_callback));
 
   if (!src_subrect_in_pixel.IsEmpty())
     copy_output_request->set_area(src_subrect_in_pixel);
 
-  readback_layer->RequestCopyOfOutput(std::move(copy_output_request));
+  surface_factory_->RequestCopyOfSurface(current_frame_->local_frame_id,
+                                         std::move(copy_output_request));
 }
 
 void DelegatedFrameHostAndroid::DestroyDelegatedContent() {
   if (!current_frame_)
     return;
 
   DCHECK(surface_factory_.get());
   DCHECK(content_layer_);
 
   content_layer_->RemoveFromParent();
@@ skipping 69 matching lines @@
         content_size_in_dip.width() < container_size_in_dip_.width() ||
         content_size_in_dip.height() < container_size_in_dip_.height();
   } else {
     background_is_drawable = true;
   }
 
   background_layer_->SetIsDrawable(background_is_drawable);
 }
 
 }  // namespace ui