Remove WorkerPool dependency from URLRequestFileJob.

net/url_request/url_request_file_job.h

Index: net/url_request/url_request_file_job.h
diff --git a/net/url_request/url_request_file_job.h b/net/url_request/url_request_file_job.h
index 6fc7fb919801c850982b55cd0742f443cafc5756..48ca639fe5e3b7fb7fe59a3c482618c0110f87d9 100644
--- a/net/url_request/url_request_file_job.h
+++ b/net/url_request/url_request_file_job.h
@@ -31,7 +31,8 @@ class NET_EXPORT URLRequestFileJob : public URLRequestJob {
  public:
   URLRequestFileJob(URLRequest* request,
                     NetworkDelegate* network_delegate,
-                    const base::FilePath& file_path);
+                    const base::FilePath& file_path,
+                    const scoped_refptr<base::TaskRunner>& task_runner);
 
   // URLRequestJob:
   virtual void Start() OVERRIDE;
@@ -91,6 +92,7 @@ class NET_EXPORT URLRequestFileJob : public URLRequestJob {
 
   scoped_ptr<FileStream> stream_;
   FileMetaInfo meta_info_;
+  scoped_refptr<base::TaskRunner> task_runner_;
 
   HttpByteRange byte_range_;
   int64 remaining_bytes_;