Revert of Remove ForceReclaimResources

content/renderer/gpu/render_widget_compositor.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/renderer/gpu/render_widget_compositor.h"
 
 #include <stddef.h>
 #include <limits>
 #include <string>
 #include <utility>
@@ skipping 901 matching lines @@
   std::unique_ptr<cc::CopyOutputRequest> request =
       cc::CopyOutputRequest::CreateBitmapRequest(base::Bind(
           [](blink::WebCompositeAndReadbackAsyncCallback* callback,
              scoped_refptr<base::SingleThreadTaskRunner> task_runner,
              std::unique_ptr<cc::CopyOutputResult> result) {
             task_runner->PostTask(FROM_HERE,
                                   base::Bind(&CompositeAndReadbackAsyncCallback,
                                              callback, base::Passed(&result)));
           },
           callback, base::Passed(&main_thread_task_runner)));
-  // Force a redraw to ensure that the copy swap promise isn't cancelled due to
-  // no damage.
-  SetNeedsForcedRedraw();
   layer_tree_host_->QueueSwapPromise(
       delegate_->RequestCopyOfOutputForLayoutTest(std::move(request)));
 
   // Force a commit to happen. The temporary copy output request will
   // be installed after layout which will happen as a part of the commit, for
   // widgets that delay the creation of their output surface.
   if (CompositeIsSynchronous()) {
     base::ThreadTaskRunnerHandle::Get()->PostTask(
         FROM_HERE, base::Bind(&RenderWidgetCompositor::SynchronouslyComposite,
                               weak_factory_.GetWeakPtr()));
@@ skipping 202 matching lines @@
     float device_scale) {
   layer_tree_host_->GetLayerTree()->SetPaintedDeviceScaleFactor(device_scale);
 }
 
 void RenderWidgetCompositor::SetDeviceColorSpace(
     const gfx::ColorSpace& color_space) {
   layer_tree_host_->GetLayerTree()->SetDeviceColorSpace(color_space);
 }
 
 }  // namespace content