Sync ui/events to chromium @ https://codereview.chromium.org/1210203002

ui/events/test/test_event_targeter.h

+// Copyright 2015 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_EVENTS_TEST_TEST_EVENT_TARGETER_H_
+#define UI_EVENTS_TEST_TEST_EVENT_TARGETER_H_
+
+#include "base/compiler_specific.h"
+#include "base/macros.h"
+#include "ui/events/event_targeter.h"
+
+namespace ui {
+namespace test {
+
+class TestEventTarget;
+
+// An EventTargeter which is used to allow a bubbling behaviour in event
+// dispatch: if an event is not handled after being dispatched to its
+// |initial_target|, the event is dispatched to the next-best target as
+// specified by FindNextBestTarget().
+// Bubbling behaviour is controlled by |should_bubble| at creation time.
+class TestEventTargeter : public EventTargeter {
+ public:
+  TestEventTargeter(TestEventTarget* initial_target, bool should_bubble);
+  ~TestEventTargeter() override;
+
+  void set_target(TestEventTarget* target);
+
+ private:
+  // EventTargeter:
+  EventTarget* FindTargetForEvent(EventTarget* root, Event* event) override;
+  EventTarget* FindNextBestTarget(EventTarget* previous_target,
+                                  Event* event) override;
+
+  TestEventTarget* target_;
+  bool should_bubble_;
+
+  DISALLOW_COPY_AND_ASSIGN(TestEventTargeter);
+};
+
+}  // namespace test
+}  // namespace ui
+
+#endif  // UI_EVENTS_TEST_TEST_EVENT_TARGETER_H_