Make MultiAnimation take time param and slow down tab highlight

ui/base/animation/multi_animation.h

Index: ui/base/animation/multi_animation.h
diff --git a/ui/base/animation/multi_animation.h b/ui/base/animation/multi_animation.h
index 37f04b09abb266fb21d6ee3f3814ebec227babaa..cbe36c4c7522558168d1d9539f9e1a5af8b7f3e3 100644
--- a/ui/base/animation/multi_animation.h
+++ b/ui/base/animation/multi_animation.h
@@ -45,9 +45,12 @@ class UI_EXPORT MultiAnimation : public Animation {
 
   typedef std::vector<Part> Parts;
 
-  explicit MultiAnimation(const Parts& parts);
+  MultiAnimation(const Parts& parts, base::TimeDelta timer_interval);
   virtual ~MultiAnimation();
 
+  // Default interval.
+  static base::TimeDelta GetDefaultTimerInterval();
+
   // Sets whether the animation continues after it reaches the end. If true, the
   // animation runs until explicitly stopped. The default is true.
   void set_continuous(bool continuous) { continuous_ = continuous; }