Reland: URLRequestJob: change ReadRawData contract

net/url_request/url_request_status.h

Index: net/url_request/url_request_status.h
diff --git a/net/url_request/url_request_status.h b/net/url_request/url_request_status.h
index 44a5d22bf04cdbfe736f08f80e42c22a1111acbe..694c51004cf22fe4f5f8f53b95b30068589f3f5e 100644
--- a/net/url_request/url_request_status.h
+++ b/net/url_request/url_request_status.h
@@ -5,6 +5,7 @@
 #ifndef NET_URL_REQUEST_URL_REQUEST_STATUS_H_
 #define NET_URL_REQUEST_URL_REQUEST_STATUS_H_
 
+#include "net/base/net_errors.h"
 #include "net/base/net_export.h"
 
 namespace net {
@@ -41,6 +42,13 @@ class NET_EXPORT URLRequestStatus {
   // deprecated. See https://crbug.com/490311.
   static URLRequestStatus FromError(int error);
 
+  // Returns a Error corresponding to |status_|.
+  //   OK for OK
+  //   ERR_IO_PENDING for IO_PENDING
+  //   ERR_ABORTED for CANCELLED
+  //   Error for FAILED
+  Error ToNetError() const;
+
   Status status() const { return status_; }
   int error() const { return error_; }