Automated IWYU fix for TaskRunner includes.

content/browser/webui/web_ui_url_loader_factory.cc

 // Copyright 2017 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/webui/web_ui_url_loader_factory.h"
 
 #include <map>
 
 #include "base/bind.h"
 #include "base/lazy_instance.h"
 #include "base/logging.h"
 #include "base/memory/ref_counted_memory.h"
+#include "base/single_thread_task_runner.h"
 #include "base/strings/string_piece.h"
 #include "content/browser/blob_storage/blob_internals_url_loader.h"
 #include "content/browser/blob_storage/chrome_blob_storage_context.h"
 #include "content/browser/frame_host/frame_tree_node.h"
 #include "content/browser/frame_host/render_frame_host_impl.h"
 #include "content/browser/histogram_internals_url_loader.h"
 #include "content/browser/resource_context_impl.h"
 #include "content/browser/webui/network_error_url_loader.h"
 #include "content/browser/webui/url_data_manager_backend.h"
 #include "content/browser/webui/url_data_source_impl.h"
@@ skipping 266 matching lines @@
 }  // namespace
 
 mojom::URLLoaderFactoryPtr GetWebUIURLLoader(FrameTreeNode* node) {
   int ftn_id = node->frame_tree_node_id();
   if (g_factories.Get()[ftn_id].get() == nullptr)
     g_factories.Get()[ftn_id] = base::MakeUnique<WebUIURLLoaderFactory>(node);
   return g_factories.Get()[ftn_id]->CreateBinding();
 }
 
 }  // namespace content