Move downloads API to extensions namespace

chrome/browser/ui/webui/downloads_dom_handler.cc

Index: chrome/browser/ui/webui/downloads_dom_handler.cc
diff --git a/chrome/browser/ui/webui/downloads_dom_handler.cc b/chrome/browser/ui/webui/downloads_dom_handler.cc
index bfea47511506cc3bd3e6f21bce31c2c09772ac5c..2290e17764b8ac0cbaccce892480be5c77a4f8e3 100644
--- a/chrome/browser/ui/webui/downloads_dom_handler.cc
+++ b/chrome/browser/ui/webui/downloads_dom_handler.cc
@@ -135,7 +135,8 @@ base::DictionaryValue* CreateDownloadItemValue(
   file_value->SetString("file_url",
                         net::FilePathToFileURL(download_path).spec());
 
-  DownloadedByExtension* by_ext = DownloadedByExtension::Get(download_item);
+  extensions::DownloadedByExtension* by_ext =
+      extensions::DownloadedByExtension::Get(download_item);
   if (by_ext) {
     file_value->SetString("by_ext_id", by_ext->id());
     file_value->SetString("by_ext_name", by_ext->name());