[Downloads] Retain a BlobDataHandle in DownloadUrlParameters.

content/browser/download/download_browsertest.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.
 
 // This file contains download browser tests that are known to be runnable
 // in a pure content context.  Over time tests should be migrated here.
 
 #include <stddef.h>
 #include <stdint.h>
 #include <utility>
@@ skipping 2391 matching lines @@
   GURL document_url = embedded_test_server()->GetURL(
       "/download/download-attribute.html?target=about:version");
   DownloadItem* download = StartDownloadAndReturnItem(shell(), document_url);
   WaitForInterrupt(download);
 
   EXPECT_EQ(DOWNLOAD_INTERRUPT_REASON_NETWORK_INVALID_REQUEST,
             download->GetLastReason());
   EXPECT_FALSE(download->CanResume());
 }
 
+IN_PROC_BROWSER_TEST_F(DownloadContentTest, DownloadAttributeBlobURL) {
+  ASSERT_TRUE(embedded_test_server()->Start());
+
+  GURL document_url =
+      embedded_test_server()->GetURL("/download/download-attribute-blob.html");
+  DownloadItem* download = StartDownloadAndReturnItem(shell(), document_url);
+  WaitForCompletion(download);
+
+  EXPECT_STREQ(FILE_PATH_LITERAL("suggested-filename.txt"),
+               download->GetTargetFilePath().BaseName().value().c_str());
+}
+
 // The file empty.bin is served with a MIME type of application/octet-stream.
 // The content body is empty. Make sure this case is handled properly and we
 // don't regress on http://crbug.com/320394.
 IN_PROC_BROWSER_TEST_F(DownloadContentTest, DownloadGZipWithNoContent) {
   GURL url = net::URLRequestMockHTTPJob::GetMockUrl("empty.bin");
   NavigateToURLAndWaitForDownload(shell(), url, DownloadItem::COMPLETE);
   // That's it. This should work without crashing.
 }
 
 // Make sure that sniffed MIME types are correctly passed through to the
@@ skipping 20 matching lines @@
 
   std::vector<DownloadItem*> downloads;
   DownloadManagerForShell(shell())->GetAllDownloads(&downloads);
   ASSERT_EQ(1u, downloads.size());
 
   EXPECT_EQ(FILE_PATH_LITERAL("Jumboshrimp.txt"),
             downloads[0]->GetTargetFilePath().BaseName().value());
 }
 
 }  // namespace content