Remove WorkerPool dependency from URLRequestFileJob.

chrome/browser/extensions/extension_resource_protocols.cc

Index: chrome/browser/extensions/extension_resource_protocols.cc
diff --git a/chrome/browser/extensions/extension_resource_protocols.cc b/chrome/browser/extensions/extension_resource_protocols.cc
index 565b08b9ece737cb5cef89fc10f58dc6cc1fa966..eb75df96dda0c696fa7db2fd98711681b9cbd4f5 100644
--- a/chrome/browser/extensions/extension_resource_protocols.cc
+++ b/chrome/browser/extensions/extension_resource_protocols.cc
@@ -7,6 +7,7 @@
 #include "base/files/file_path.h"
 #include "base/memory/weak_ptr.h"
 #include "base/path_service.h"
+#include "base/threading/sequenced_worker_pool.h"
 #include "base/threading/thread_checker.h"
 #include "chrome/common/chrome_paths.h"
 #include "chrome/common/extensions/extension_file_util.h"
@@ -25,9 +26,12 @@ class ExtensionResourcesJob : public net::URLRequestFileJob {
  public:
   ExtensionResourcesJob(net::URLRequest* request,
                         net::NetworkDelegate* network_delegate)
-    : net::URLRequestFileJob(request, network_delegate, base::FilePath()),
-      weak_ptr_factory_(this) {
-  }
+      : net::URLRequestFileJob(
+            request, network_delegate, base::FilePath(),
+            content::BrowserThread::GetBlockingPool()->
+                GetTaskRunnerWithShutdownBehavior(
+                    base::SequencedWorkerPool::SKIP_ON_SHUTDOWN)),
+        weak_ptr_factory_(this) {}
 
   virtual void Start() OVERRIDE;