Fix webkitGetEntry for non-native files.

content/browser/renderer_host/render_widget_host_impl.cc

Index: content/browser/renderer_host/render_widget_host_impl.cc
diff --git a/content/browser/renderer_host/render_widget_host_impl.cc b/content/browser/renderer_host/render_widget_host_impl.cc
index dd33dfef7e3bd79e8eb6aaf0cf2085892f6fed68..4009f9eae81d84de7a5fec3fc6ed7c4d767b20a2 100644
--- a/content/browser/renderer_host/render_widget_host_impl.cc
+++ b/content/browser/renderer_host/render_widget_host_impl.cc
@@ -2516,6 +2516,7 @@ void RenderWidgetHostImpl::GrantFileAccessFromDropData(DropData* drop_data) {
         GURL(storage::GetIsolatedFileSystemRootURIString(
                  file_system_url.origin(), filesystem_id, std::string())
                  .append(register_name));
+    file_system_file.filesystem_id = base::UTF8ToUTF16(filesystem_id);
   }
 }