Files.app: Remove getDriveFiles function from the private API.

chrome/browser/chromeos/extensions/file_manager/private_api_dialog.cc

Index: chrome/browser/chromeos/extensions/file_manager/private_api_dialog.cc
diff --git a/chrome/browser/chromeos/extensions/file_manager/private_api_dialog.cc b/chrome/browser/chromeos/extensions/file_manager/private_api_dialog.cc
index 9c105ec1b37af32677db090c607e0f0e8ba3f36a..45ab3c0aa02de414a21a412b761ac82d7e6e5198 100644
--- a/chrome/browser/chromeos/extensions/file_manager/private_api_dialog.cc
+++ b/chrome/browser/chromeos/extensions/file_manager/private_api_dialog.cc
@@ -98,6 +98,11 @@ bool FileManagerPrivateSelectFilesFunction::RunAsync() {
 void FileManagerPrivateSelectFilesFunction::GetSelectedFileInfoResponse(
     const std::vector<ui::SelectedFileInfo>& files) {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
+  if (files.empty()) {
+    SendResponse(false);
+    return;
+  }
+
   SelectFileDialogExtension::OnMultiFilesSelected(GetFileDialogRoutingID(this),
                                                   files);
   SendResponse(true);