Add global and per-browser settings (issue #145).

This exposes the following new capabilities:
- Ability to disable drag & drop from other windows.
- Ability to specify additional plugin search paths.
- Ability to customize WebPreferences values, including enabling cross-site scripting.
- Ability to set User-Agent or product version.
- Ability to set default locale.

git-svn-id: https://chromiumembedded.googlecode.com/svn/trunk@144 5089003a-bbd8-11dd-ad1f-f1f9622dbc98

libcef/cef_string_list.cc

@@ -53,3 +53,10 @@ CEF_EXPORT void cef_string_list_free(cef_string_list_t list)
   DCHECK(list);
   delete (StringList*)list;
 }
+
+CEF_EXPORT cef_string_list_t cef_string_list_copy(cef_string_list_t list)
+{
+  DCHECK(list);
+  StringList* impl = (StringList*)list;
+  return new StringList(*impl);
+}