Make the material design ripple effect more visible on a quick action (single click or single tap)

ui/compositor/test/layer_animator_test_controller.cc

 // Copyright (c) 2013 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 <stddef.h>
 
 #include "cc/animation/animation.h"
 #include "cc/animation/animation_events.h"
 #include "ui/compositor/layer_animation_sequence.h"
 #include "ui/compositor/test/layer_animator_test_controller.h"
@@ skipping 38 matching lines @@
     if (!element->Started() ||
         element->effective_start_time() != base::TimeTicks())
       continue;
 
     animator_->OnThreadedAnimationStarted(cc::AnimationEvent(
         cc::AnimationEvent::STARTED, 0, element->animation_group_id(),
         threaded_properties[i], base::TimeTicks::Now()));
   }
 }
 
+void LayerAnimatorTestController::Step(const base::TimeDelta& duration) {
+  animator_->Step(animator_->last_step_time() + duration);
+}
+
 }  // namespace ui