repairs CopyFromCompositingSurface in HighDPI

This CL removes the DIP=>Pixel transform in
DelegatedFrameHost::CopyFromCompositingSurface(), because said
transformation seems to be happening later in the copy logic
and is currently being applied twice.

BUG=397708

Review URL: https://codereview.chromium.org/421293002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@286414 0039d316-1c4b-4281-b951-d872f2087c98
void DelegatedFrameHost::SendDelegatedFrameAck(uint32 output_surface_id) {
  RenderWidgetHostImpl* host = client_->GetHost();
  cc::CompositorFrameAck ack;
  if (!surface_returned_resources_.empty())
    ack.resources.swap(surface_returned_resources_);
  if (resource_collection_)
    resource_collection_->TakeUnusedResourcesForChildCompositor(&ack.resources);
  RenderWidgetHostImpl::SendSwapCompositorFrameAck(host->GetRoutingID(),
                                                   output_surface_id,
                                                   host->GetProcess()->GetID(),
                                                   ack);
  DCHECK_GT(pending_delegated_ack_count_, 0);
  pending_delegated_ack_count_--;
}

void DelegatedFrameHost::SendDelegatedFrameAck(uint32 output_surface_id) {
  RenderWidgetHostImpl* host = client_->GetHost();
  cc::CompositorFrameAck ack;
  if (!surface_returned_resources_.empty())
    ack.resources.swap(surface_returned_resources_);
  if (resource_collection_)
    resource_collection_->TakeUnusedResourcesForChildCompositor(&ack.resources);
  RenderWidgetHostImpl::SendSwapCompositorFrameAck(host->GetRoutingID(),
                                                   output_surface_id,
                                                   host->GetProcess()->GetID(),
                                                   ack);
  DCHECK_GT(pending_delegated_ack_count_, 0);
  pending_delegated_ack_count_--;
}
