Add MD ink drop ripple to app list button

ui/views/animation/test/ink_drop_host_view_test_api.cc

 // Copyright 2016 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 "ui/views/animation/test/ink_drop_host_view_test_api.h"
 
 namespace views {
 namespace test {
 
 InkDropHostViewTestApi::InkDropHostViewTestApi(InkDropHostView* host_view)
     : host_view_(host_view) {}
 
 InkDropHostViewTestApi::~InkDropHostViewTestApi() {}
 
 void InkDropHostViewTestApi::SetInkDrop(std::unique_ptr<InkDrop> ink_drop) {
-  host_view_->SetHasInkDrop(true);
+  if (!host_view_->ink_drop_)

[bruthig, 2016/06/22 19:07:29]

This should never result in true, InkDropHostViews should always have an
|ink_drop_| instance.

Perhaps we need a SetInkDrop(std::unique_ptr<InkDrop> ink_drop, bool
handles_gesture_event) overload?

+    host_view_->SetHasInkDrop(true);
   host_view_->ink_drop_ = std::move(ink_drop);
 }
 
 }  // namespace test
 }  // namespace views