Add support to the UI Service to run it inside the browser's process.

services/ui/common/image_cursors_set.h

+// Copyright 2017 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 SERVICES_UI_COMMON_IMAGE_CURSORS_SET_H_
+#define SERVICES_UI_COMMON_IMAGE_CURSORS_SET_H_
+
+#include <memory>
+#include <set>
+
+#include "base/macros.h"
+#include "base/memory/weak_ptr.h"
+
+namespace ui {
+
+class ImageCursors;
+
+// Helper class wrapping a set of ImageCursors objects.
+class ImageCursorsSet {
+ public:
+  ImageCursorsSet();
+  ~ImageCursorsSet();
+
+  void AddImageCursors(std::unique_ptr<ImageCursors> image_cursors);
+  void DeleteImageCursors(ImageCursors* image_cursors);
+  base::WeakPtr<ImageCursorsSet> GetWeakPtr();
+
+ private:
+  std::set<std::unique_ptr<ImageCursors>> image_cursors_set_;
+  base::WeakPtrFactory<ImageCursorsSet> weak_ptr_factory_;
+
+  DISALLOW_COPY_AND_ASSIGN(ImageCursorsSet);
+};
+
+}  // namespace ui
+
+#endif  // SERVICES_UI_COMMON_IMAGE_CURSORS_SET_H_