[Downloads] Retain a BlobDataHandle in DownloadUrlParameters.

content/browser/download/download_manager_impl.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 "content/browser/download/download_manager_impl.h"
 
 #include <iterator>
 #include <utility>
 
 #include "base/bind.h"
@@ skipping 27 matching lines @@
 #include "content/public/browser/notification_types.h"
 #include "content/public/browser/render_process_host.h"
 #include "content/public/browser/resource_context.h"
 #include "content/public/browser/web_contents_delegate.h"
 #include "content/public/common/referrer.h"
 #include "net/base/elements_upload_data_stream.h"
 #include "net/base/load_flags.h"
 #include "net/base/request_priority.h"
 #include "net/base/upload_bytes_element_reader.h"
 #include "net/url_request/url_request_context.h"
+#include "storage/browser/blob/blob_url_request_job_factory.h"
 #include "url/origin.h"
 
 namespace content {
 namespace {
 
 scoped_ptr<UrlDownloader, BrowserThread::DeleteOnIOThread> BeginDownload(
     scoped_ptr<DownloadUrlParameters> params,
     uint32_t download_id,
     base::WeakPtr<DownloadManagerImpl> download_manager) {
   DCHECK_CURRENTLY_ON(BrowserThread::IO);
 
   scoped_ptr<net::URLRequest> url_request =
       DownloadRequestCore::CreateRequestOnIOThread(download_id, params.get());
+  scoped_ptr<storage::BlobDataHandle> blob_data_handle =
+      params->GetBlobDataHandle();
+  if (blob_data_handle) {
+    storage::BlobProtocolHandler::SetRequestedBlobDataHandle(
+        url_request.get(), std::move(blob_data_handle));
+  }
 
   // If there's a valid renderer process associated with the request, then the
   // request should be driven by the ResourceLoader. Pass it over to the
   // ResourceDispatcherHostImpl which will in turn pass it along to the
   // ResourceLoader.
   if (params->render_process_host_id() != -1) {
     DownloadInterruptReason reason =
         ResourceDispatcherHostImpl::Get()->BeginDownload(
             std::move(url_request), params->referrer(),
             params->content_initiated(), params->resource_context(),
@@ skipping 640 matching lines @@
   if (delegate_)
     delegate_->OpenDownload(download);
 }
 
 void DownloadManagerImpl::ShowDownloadInShell(DownloadItemImpl* download) {
   if (delegate_)
     delegate_->ShowDownloadInShell(download);
 }
 
 }  // namespace content