[Downloads] Move client guid for AV scanning of downloaded files to chrome/

content/browser/download/download_manager_impl.cc

Index: content/browser/download/download_manager_impl.cc
diff --git a/content/browser/download/download_manager_impl.cc b/content/browser/download/download_manager_impl.cc
index 58fe9522179a0f9bdb1e77ca5fa4139918e4ce0f..e02931e817d66fc00c7759770347d374fb25b12a 100644
--- a/content/browser/download/download_manager_impl.cc
+++ b/content/browser/download/download_manager_impl.cc
@@ -418,6 +418,13 @@ void DownloadManagerImpl::StartDownloadWithId(
           delegate_->GenerateFileHash(),
           stream.Pass(), download->GetBoundNetLog(),
           download->DestinationObserverAsWeakPtr()));
+
+  // Attach the client ID identifying the app to the AV system.
+  std::string client_guid;
+  if (delegate_)
+    client_guid = delegate_->ApplicationClientIdForFileScanning();
+  download_file->SetClientGuid(client_guid);
+
   scoped_ptr<DownloadRequestHandleInterface> req_handle(
       new DownloadRequestHandle(info->request_handle));
   download->Start(download_file.Pass(), req_handle.Pass());