Fix crash when InkDropHostView::SetHasInkDrop() is called multiple times

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::SetHasInkDrop(bool has_an_ink_drop) {
+  host_view_->SetHasInkDrop(has_an_ink_drop);
+}
+
 void InkDropHostViewTestApi::SetInkDrop(std::unique_ptr<InkDrop> ink_drop) {
   host_view_->SetHasInkDrop(true);
   host_view_->ink_drop_ = std::move(ink_drop);
 }
 
+bool InkDropHostViewTestApi::HasGestureHandler() const {
+  return host_view_->gesture_handler_ != nullptr;
+}
+
 gfx::Point InkDropHostViewTestApi::GetInkDropCenterBasedOnLastEvent() const {
   return host_view_->GetInkDropCenterBasedOnLastEvent();
 }
 
 void InkDropHostViewTestApi::AnimateInkDrop(InkDropState state,
                                             const ui::LocatedEvent* event) {
   host_view_->AnimateInkDrop(state, event);
 }
 
 }  // namespace test
 }  // namespace views