[Downloads] Always call DM::StartDownload() for explicit downloads.

content/browser/loader/mime_type_resource_handler.cc

Index: content/browser/loader/mime_type_resource_handler.cc
diff --git a/content/browser/loader/mime_type_resource_handler.cc b/content/browser/loader/mime_type_resource_handler.cc
index 3c69c0ad4d2c9f644a7697cdf27652d4ed7e539b..c9a9bb89be39254ca2bc9151a68a7b49b47a9141 100644
--- a/content/browser/loader/mime_type_resource_handler.cc
+++ b/content/browser/loader/mime_type_resource_handler.cc
@@ -385,13 +385,9 @@ bool MimeTypeResourceHandler::SelectNextHandler(bool* defer) {
   // Install download handler
   info->set_is_download(true);
   scoped_ptr<ResourceHandler> handler(
-      host_->CreateResourceHandlerForDownload(
-          request(),
-          true,  // is_content_initiated
-          must_download,
-          DownloadItem::kInvalidId,
-          scoped_ptr<DownloadSaveInfo>(new DownloadSaveInfo()),
-          DownloadUrlParameters::OnStartedCallback()));
+      host_->CreateResourceHandlerForDownload(request(),
+                                              true,  // is_content_initiated
+                                              must_download));
   return UseAlternateNextHandler(std::move(handler), std::string());
 }