Add PDF compositor service

content/utility/utility_thread_impl.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 "content/utility/utility_thread_impl.h"
 
 #include <stddef.h>
 #include <utility>
 
 #include "base/command_line.h"
@@ skipping 50 matching lines @@
     // Close the channel to cause UtilityProcessHostImpl to be deleted. We need
     // to take a different code path than the multi-process case because that
     // depends on the child process going away to close the channel, but that
     // can't happen when we're in single process mode.
     channel()->Close();
   } else {
     ChildProcess::current()->ReleaseProcess();
   }
 }
 
+scoped_refptr<base::SingleThreadTaskRunner>
+UtilityThreadImpl::GetIOTaskRunner() {
+  return ChildProcess::current()->io_task_runner();
+}
+
 void UtilityThreadImpl::EnsureBlinkInitialized() {
   if (blink_platform_impl_ || IsInBrowserProcess()) {
     // We can only initialize WebKit on one thread, and in single process mode
     // we run the utility thread on separate thread. This means that if any code
     // needs WebKit initialized in the utility process, they need to have
     // another path to support single process mode.
     return;
   }
 
   blink_platform_impl_.reset(new UtilityBlinkPlatformImpl);
@@ skipping 46 matching lines @@
 }
 
 void UtilityThreadImpl::BindServiceFactoryRequest(
     service_manager::mojom::ServiceFactoryRequest request) {
   DCHECK(service_factory_);
   service_factory_bindings_.AddBinding(service_factory_.get(),
                                        std::move(request));
 }
 
 }  // namespace content