Make MultiAnimation take time param and slow down tab highlight

ash/launcher/tabbed_launcher_button.cc

Index: ash/launcher/tabbed_launcher_button.cc
diff --git a/ash/launcher/tabbed_launcher_button.cc b/ash/launcher/tabbed_launcher_button.cc
index 9ab491fb648908125e636f65c6d8ebb844aef119..7bd5682e7254f08dbf3887b851013ac250e3f766 100644
--- a/ash/launcher/tabbed_launcher_button.cc
+++ b/ash/launcher/tabbed_launcher_button.cc
@@ -68,7 +68,9 @@ void TabbedLauncherButton::IconView::SetTabImage(const gfx::ImageSkia& image) {
       animation_parts.push_back(ui::MultiAnimation::Part(500, ui::Tween::ZERO));
       animation_parts.push_back(
           ui::MultiAnimation::Part(200, ui::Tween::EASE_OUT));
-      animation_.reset(new ui::MultiAnimation(animation_parts));
+      animation_.reset(new ui::MultiAnimation(
+          animation_parts,
+          ui::MultiAnimation::GetDefaultTimerInterval()));
       animation_->set_continuous(false);
       animation_->set_delegate(this);
       animation_->Start();