blink: Cleanup core class forward declarations

third_party/WebKit/Source/core/input/EventHandler.h

Index: third_party/WebKit/Source/core/input/EventHandler.h
diff --git a/third_party/WebKit/Source/core/input/EventHandler.h b/third_party/WebKit/Source/core/input/EventHandler.h
index fa3e4f5fd3ba5b2edbd69868db2a3b43a4929f0a..b6bded3ddb876fc197a1abb7914d89cd03902edb 100644
--- a/third_party/WebKit/Source/core/input/EventHandler.h
+++ b/third_party/WebKit/Source/core/input/EventHandler.h
@@ -55,13 +55,11 @@ namespace blink {
 
 class DataTransfer;
 class PaintLayer;
-class Document;
 class Element;
 class Event;
 class EventTarget;
 template <typename EventType>
 class EventWithHitTestResults;
-class FloatPoint;
 class FloatQuad;
 class FrameHost;
 class HTMLFrameSetElement;
@@ -79,7 +77,6 @@ class Scrollbar;
 class SelectionController;
 class TextEvent;
 class WheelEvent;
-class Widget;
 
 class CORE_EXPORT EventHandler final
     : public GarbageCollectedFinalized<EventHandler> {