Report detailed batch upload error by UMA.

google_apis/drive/drive_api_requests.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "google_apis/drive/drive_api_requests.h"
 
 #include <stddef.h>
 
 #include "base/bind.h"
 #include "base/callback.h"
@@ skipping 1376 matching lines @@
 }
 
 std::vector<std::string> BatchUploadRequest::GetExtraRequestHeaders() const {
   std::vector<std::string> headers;
   headers.push_back(kBatchUploadHeader);
   return headers;
 }
 
 void BatchUploadRequest::ProcessURLFetchResults(const net::URLFetcher* source) {
   // Return the detailed raw HTTP code if the error code is abstracted
-  // DRIVE_OTHER_ERROR.
-  UMA_HISTOGRAM_SPARSE_SLOWLY(kUMADriveBatchUploadResponseCode,
-                              GetErrorCode() != DRIVE_OTHER_ERROR
-                                  ? GetErrorCode()
-                                  : source->GetResponseCode());
+  // DRIVE_OTHER_ERROR. If HTTP connection is failed and the status code is -1,
+  // return network status error.
+  int histogram_error = 0;
+  if (GetErrorCode() != DRIVE_OTHER_ERROR) {
+    histogram_error = GetErrorCode();
+  } else if (source->GetResponseCode() != -1) {
+    histogram_error = source->GetResponseCode();
+  } else {
+    histogram_error = source->GetStatus().error();
+  }
+  UMA_HISTOGRAM_SPARSE_SLOWLY(
+      kUMADriveBatchUploadResponseCode, histogram_error);
 
   if (!IsSuccessfulDriveApiErrorCode(GetErrorCode())) {
     RunCallbackOnPrematureFailure(GetErrorCode());
     sender_->RequestFinished(this);
     return;
   }
 
   std::string content_type;
   source->GetResponseHeaders()->EnumerateHeader(
       /* need only first header */ NULL, "Content-Type", &content_type);
@@ skipping 38 matching lines @@
     } else if (last_progress_value_ < child->data_offset + child->data_size &&
                child->data_offset + child->data_size < current) {
       child->request->NotifyUploadProgress(source, child->data_size,
                                            child->data_size);
     }
   }
   last_progress_value_ = current;
 }
 }  // namespace drive
 }  // namespace google_apis