Change bookmarkManager API from experimental to private.

webkit/glue/webclipboard_impl.cc

Index: webkit/glue/webclipboard_impl.cc
diff --git a/webkit/glue/webclipboard_impl.cc b/webkit/glue/webclipboard_impl.cc
index 3dff08f28c9bcece37fef3c7d363c830a82dc0ab..faa7f17c1473ee1fe4cbf1ca3576d23b7a7a5e4f 100644
--- a/webkit/glue/webclipboard_impl.cc
+++ b/webkit/glue/webclipboard_impl.cc
@@ -243,7 +243,7 @@ void WebClipboardImpl::writeDataObject(const WebDragData& data) {
   // that ScopedClipboardWriterGlue's dtor remains a no-op if the page didn't
   // modify the DataTransfer object, which is important to avoid stomping on
   // any clipboard contents written by extension functions such as
-  // chrome.experimental.bookmarkManager.copy.
+  // chrome.bookmarkManagerPrivate.copy.
   if (!data_object.custom_data.empty()) {
     Pickle pickle;
     ui::WriteCustomDataToPickle(data_object.custom_data, &pickle);