Update to Chromium revision ad468e8b (#292352).

- Building Chromium using SVN is no longer supported.
- Remove CefDOMEvent and CefDOMEventListener (issue #933).
- Remove CefRenderHandler::OnScrollOffsetChanged (http://crbug.com/404656).
- Remove UR_FLAG_REPORT_LOAD_TIMING (https://codereview.chromium.org/451623002/).

git-svn-id: https://chromiumembedded.googlecode.com/svn/trunk@1816 5089003a-bbd8-11dd-ad1f-f1f9622dbc98

tests/cefclient/cefclient_osr_widget_gtk.cpp

@@ -976,10 +976,6 @@ gint glarea_scroll_event(GtkWidget* widget,
   return TRUE;
 }
 
-void process(GdkEventKey* event) {
-  
-}
-
 gint glarea_key_event(GtkWidget* widget,
                       GdkEventKey* event,
                       OSRWindow* window) {
@@ -1091,7 +1087,6 @@ class ScopedGLContext {
 
  private:
   bool swap_buffers_;
-  GdkGLContext* glcontext_;
   GdkGLDrawable* gldrawable_;
   bool is_valid_;
 };