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

chrome/browser/popup_blocked_animation.h

+// 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.
+
+#ifndef CHROME_BROWSER_POPUP_BLOCKED_ANIMATION_H_
+#define CHROME_BROWSER_POPUP_BLOCKED_ANIMATION_H_
+
+#include "base/basictypes.h"
+
+class TabContents;
+
+// The popup blocker lives in the Omnibox with the rest of the blocked content
+// controls. This icon is hard to notice when it appears as a result of user-
+// initiated action. This creates an animation from the center of the window
+// to the blocked popup icon in the Omnibox to draw the user's attention to it.
+class PopupBlockedAnimation {
+ public:
+  static void Show(TabContents* tab_contents);
+
+ private:
+  PopupBlockedAnimation() {}
+  DISALLOW_COPY_AND_ASSIGN(PopupBlockedAnimation);
+};
+
+#endif  // CHROME_BROWSER_POPUP_BLOCKED_ANIMATION_H_