[BlobStorage] Better net error reporting for pre-broken blobs

content/browser/blob_storage/blob_url_request_job_unittest.cc

 // Copyright 2013 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 <stdint.h>
 
 #include <limits>
 #include <memory>
 
 #include "base/bind.h"
@@ skipping 585 matching lines @@
       kTestDiskCacheStreamIndex, kTestDiskCacheSideStreamIndex);
   expected_status_code_ = 200;
   expected_response_ = kTestDiskCacheData2;
   TestRequest("GET", net::HttpRequestHeaders());
   EXPECT_EQ(static_cast<int>(arraysize(kTestDiskCacheData2) - 1),
             request_->response_headers()->GetContentLength());
 
   EXPECT_FALSE(url_request_delegate_.metadata());
 }
 
+TEST_F(BlobURLRequestJobTest, BrokenBlob) {
+  blob_handle_ = blob_context_.AddBrokenBlob(
+      "uuid", "", "", storage::BlobStatus::ERR_INVALID_CONSTRUCTION_ARGUMENTS);
+  TestErrorRequest(500);
+}
+
 }  // namespace content