Enumerate the return value of dispatchEvent so it is clear.

third_party/WebKit/Source/core/events/PointerEvent.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 PointerEvent_h
 #define PointerEvent_h
 
 #include "core/events/MouseEvent.h"
 #include "core/events/PointerEventInit.h"
 #include "platform/PlatformTouchPoint.h"
@@ skipping 46 matching lines @@
 };
 
 
 class PointerEventDispatchMediator final : public EventDispatchMediator {
 public:
     static PassRefPtrWillBeRawPtr<PointerEventDispatchMediator> create(PassRefPtrWillBeRawPtr<PointerEvent>);
 
 private:
     explicit PointerEventDispatchMediator(PassRefPtrWillBeRawPtr<PointerEvent>);
     PointerEvent& event() const;
-    bool dispatchEvent(EventDispatcher&) const override;
+    DispatchEventResult dispatchEvent(EventDispatcher&) const override;
 };
 
 DEFINE_EVENT_TYPE_CASTS(PointerEvent);
 
 } // namespace blink
 
 #endif // PointerEvent_h