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

services/ui/common/image_cursors_set.cc

Index: services/ui/common/image_cursors_set.cc
diff --git a/services/ui/common/image_cursors_set.cc b/services/ui/common/image_cursors_set.cc
new file mode 100644
index 0000000000000000000000000000000000000000..4e0a92ad9800470c6f2c6ac9d83f2eb34fccfb6a
--- /dev/null
+++ b/services/ui/common/image_cursors_set.cc
@@ -0,0 +1,37 @@
+// 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.
+
+#include "services/ui/common/image_cursors_set.h"
+
+#include <algorithm>
+
+#include "ui/base/cursor/image_cursors.h"
+
+namespace ui {
+
+ImageCursorsSet::ImageCursorsSet() : weak_ptr_factory_(this) {}
+
+ImageCursorsSet::~ImageCursorsSet() {}
+
+void ImageCursorsSet::AddImageCursors(
+    std::unique_ptr<ImageCursors> image_cursors) {
+  auto result = image_cursors_set_.insert(std::move(image_cursors));
+  DCHECK(result.second);
+}
+
+void ImageCursorsSet::RemoveImageCursors(ImageCursors* image_cursors) {
+  auto it =
+      std::find_if(image_cursors_set_.begin(), image_cursors_set_.end(),
+                   [image_cursors](const std::unique_ptr<ImageCursors>& elmt) {
+                     return elmt.get() == image_cursors;
+                   });
+  DCHECK(it != image_cursors_set_.end());
+  image_cursors_set_.erase(it);
+}
+
+base::WeakPtr<ImageCursorsSet> ImageCursorsSet::GetWeakPtr() {
+  return weak_ptr_factory_.GetWeakPtr();
+}
+
+}  // namespace ui