Retry uploading in UploadJobImpl when error occurs

chrome/browser/chromeos/policy/upload_job_impl.h

Index: chrome/browser/chromeos/policy/upload_job_impl.h
diff --git a/chrome/browser/chromeos/policy/upload_job_impl.h b/chrome/browser/chromeos/policy/upload_job_impl.h
index 96d7df125759418c052398d7dc0c212bc6076341..3685740898af8272fb928638ecdafc920ca26706 100644
--- a/chrome/browser/chromeos/policy/upload_job_impl.h
+++ b/chrome/browser/chromeos/policy/upload_job_impl.h
@@ -66,6 +66,14 @@ class UploadJobImpl : public UploadJob,
 
  private:
   // Indicates the current state of the UploadJobImpl.
+  // State transitions for successful upload:
+  //   IDLE -> ACQUIRING_TOKEN -> PREPARING_CONTENT -> UPLOADING -> SUCCESS
+  // If error happens, state goes back to ACQUIRING_TOKEN
+  // State transitions when error occurs once:
+  //   IDLE -> ACQUIRING_TOKEN -> PREPARING_CONTENT -> UPLOADING ->
+  //     -> ACQUIRING_TOKEN -> PREPARING_CONTENT -> UPLOADING -> SUCCESS
+  // State transitions when tried unsuccessfully kMaxRetries times:
+  //   ... -> PPREPARING_CONTENT -> UPLOADING -> ERROR

[Andrew T Wilson (Slow), 2016/04/08 15:42:56]

nit: PPREPARING->PREPARING

[Marton Hunyady, 2016/04/08 16:47:46]

Done.

   enum State {
     IDLE,               // Start() has not been called.
     ACQUIRING_TOKEN,    // Trying to acquire the access token.
@@ -85,6 +93,8 @@ class UploadJobImpl : public UploadJob,
   // net::URLFetcherDelegate:
   void OnURLFetchComplete(const net::URLFetcher* source) override;
 
+  void HandleError(ErrorCode errorCode);
+
   // Requests an access token for the upload scope.
   void RequestAccessToken();