[Mac] Display a quick animation when a popup is blocked so the user notices it in the Omnibox.

chrome/browser/gtk/popup_blocked_animation_gtk.cc

Index: chrome/browser/gtk/popup_blocked_animation_gtk.cc
diff --git a/chrome/browser/gtk/popup_blocked_animation_gtk.cc b/chrome/browser/gtk/popup_blocked_animation_gtk.cc
new file mode 100644
index 0000000000000000000000000000000000000000..391921b46399487f77f6e60626a352dff8decbf5
--- /dev/null
+++ b/chrome/browser/gtk/popup_blocked_animation_gtk.cc
@@ -0,0 +1,10 @@
+// Copyright (c) 2010 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "chrome/browser/popup_blocked_animation.h"
+#include "chrome/browser/tab_contents/tab_contents.h"
+
+void PopupBlockedAnimation::Show(TabContents* tab_contents) {
+  // TODO(port): Implement. http://crbug.com/49341
+}