Change webkit/{fileapi,quota} code to use TaskRunner.

webkit/fileapi/file_system_url_request_job.cc

Index: webkit/fileapi/file_system_url_request_job.cc
diff --git a/webkit/fileapi/file_system_url_request_job.cc b/webkit/fileapi/file_system_url_request_job.cc
index 8b39722b535bc60bdad999a331428bb80871e62c..7c998f17e9123ebdffafead7d74931eaf514f8bf 100644
--- a/webkit/fileapi/file_system_url_request_job.cc
+++ b/webkit/fileapi/file_system_url_request_job.cc
@@ -158,9 +158,7 @@ void FileSystemURLRequestJob::StartAsync() {
     return;
   DCHECK(!reader_.get());
   FileSystemOperationInterface* operation =
-      file_system_context_->CreateFileSystemOperation(
-          request_->url(),
-          file_thread_proxy_);
+      file_system_context_->CreateFileSystemOperation(request_->url());
   if (!operation) {
     NotifyDone(URLRequestStatus(URLRequestStatus::FAILED,
                                 net::ERR_INVALID_URL));
@@ -206,8 +204,7 @@ void FileSystemURLRequestJob::DidGetMetadata(
   reader_.reset(
       file_system_context_->CreateFileReader(
           request_->url(),
-          byte_range_.first_byte_position(),
-          file_thread_proxy_));
+          byte_range_.first_byte_position()));
 
   set_expected_content_size(remaining_bytes_);
   response_info_.reset(new net::HttpResponseInfo());