Offload disk accesses to WorkerPool in ExtensionProtocolHandler

net/url_request/url_request_simple_job.cc

Index: net/url_request/url_request_simple_job.cc
===================================================================
--- net/url_request/url_request_simple_job.cc	(revision 145483)
+++ net/url_request/url_request_simple_job.cc	(working copy)
@@ -57,11 +57,19 @@
   if (!request_)
     return;
 
-  if (GetData(&mime_type_, &charset_, &data_)) {
+  int result = GetData(&mime_type_, &charset_, &data_,
+                       base::Bind(&URLRequestSimpleJob::OnGetDataCompleted,
+                                  weak_factory_.GetWeakPtr()));
+  if (result != ERR_IO_PENDING)
+    OnGetDataCompleted(result);
+}
+
+void URLRequestSimpleJob::OnGetDataCompleted(int result) {
+  if (result == OK) {
     // Notify that the headers are complete
     NotifyHeadersComplete();
   } else {
-    // what should the error code be?
+    DCHECK_EQ(result, ERR_FAILED);
     NotifyStartError(URLRequestStatus(URLRequestStatus::FAILED,
                                       ERR_INVALID_URL));
   }