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

ui/views/animation/test/ink_drop_host_view_test_api.h

 // 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.
 
 #ifndef UI_VIEWS_ANIMATION_TEST_INK_DROP_HOST_VIEW_TEST_API_H_
 #define UI_VIEWS_ANIMATION_TEST_INK_DROP_HOST_VIEW_TEST_API_H_
 
 #include <memory>
 #include <vector>
 
 #include "base/macros.h"
 #include "ui/views/animation/ink_drop.h"
 #include "ui/views/animation/ink_drop_host_view.h"
 
 namespace views {
 namespace test {
 
 // Test API to provide internal access to an InkDropHostView instance.
 class InkDropHostViewTestApi {
  public:
   explicit InkDropHostViewTestApi(InkDropHostView* host_view);
   ~InkDropHostViewTestApi();
 
+  void SetHasInkDrop(bool has_an_ink_drop);
+
   void SetInkDrop(std::unique_ptr<InkDrop> ink_drop);
   InkDrop* ink_drop() { return host_view_->ink_drop(); }
 
+  bool HasGestureHandler() const;
+
   // Wrapper for InkDropHostView::GetInkDropCenterBasedOnLastEvent().
   gfx::Point GetInkDropCenterBasedOnLastEvent() const;
 
   // Wrapper for InkDropHostView::AnimateInkDrop().
   void AnimateInkDrop(InkDropState state, const ui::LocatedEvent* event);
 
  private:
   // The InkDropHostView to provide internal access to.
   InkDropHostView* host_view_;
 
   DISALLOW_COPY_AND_ASSIGN(InkDropHostViewTestApi);
 };
 
 }  // namespace test
 }  // namespace views
 
 #endif  // UI_VIEWS_ANIMATION_TEST_INK_DROP_HOST_VIEW_TEST_API_H_