Remove WorkerPool dependency from URLRequestFileJob.

chrome/browser/profiles/profile_io_data.cc

Index: chrome/browser/profiles/profile_io_data.cc
diff --git a/chrome/browser/profiles/profile_io_data.cc b/chrome/browser/profiles/profile_io_data.cc
index 0776e538b940c878ebb559adf2f9ecef0cb42251..84379e6e36dec014da4814a1b3824432043b5d8a 100644
--- a/chrome/browser/profiles/profile_io_data.cc
+++ b/chrome/browser/profiles/profile_io_data.cc
@@ -19,6 +19,7 @@
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/string_util.h"
 #include "base/strings/stringprintf.h"
+#include "base/threading/sequenced_worker_pool.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/chrome_notification_types.h"
 #include "chrome/browser/content_settings/content_settings_provider.h"
@@ -835,7 +836,11 @@ scoped_ptr<net::URLRequestJobFactory> ProfileIOData::SetUpJobFactoryDefaults(
   // NOTE(willchan): Keep these protocol handlers in sync with
   // ProfileIOData::IsHandledProtocol().
   bool set_protocol = job_factory->SetProtocolHandler(
-      chrome::kFileScheme, new net::FileProtocolHandler());
+      chrome::kFileScheme,
+      new net::FileProtocolHandler(
+          content::BrowserThread::GetBlockingPool()->
+              GetTaskRunnerWithShutdownBehavior(
+                  base::SequencedWorkerPool::SKIP_ON_SHUTDOWN)));
   DCHECK(set_protocol);
 
   DCHECK(extension_info_map_.get());