Extract more of the mouse logic from EventHandler

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

 // Copyright 2016 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 EventHandlingUtil_h
 #define EventHandlingUtil_h
 
-#include "core/frame/LocalFrame.h"
 #include "core/layout/HitTestResult.h"
+#include "core/page/EventWithHitTestResults.h"
 #include "platform/geometry/LayoutPoint.h"
 #include "public/platform/WebInputEventResult.h"
 
 namespace blink {
 
+class LocalFrame;
+class ScrollableArea;
+class PaintLayer;
+
 namespace EventHandlingUtil {
 
 HitTestResult hitTestResultInFrame(
     LocalFrame*,
     const LayoutPoint&,
     HitTestRequest::HitTestRequestType hitType = HitTestRequest::ReadOnly |
                                                  HitTestRequest::Active);
 
 WebInputEventResult mergeEventResult(WebInputEventResult resultA,
                                      WebInputEventResult resultB);
 WebInputEventResult toWebInputEventResult(DispatchEventResult);
 
+PaintLayer* layerForNode(Node*);
+ScrollableArea* associatedScrollableArea(const PaintLayer*);
+
+ContainerNode* parentForClickEvent(const Node&);
+
+LayoutPoint contentPointFromRootFrame(LocalFrame*,
+                                      const IntPoint& pointInRootFrame);
+
+MouseEventWithHitTestResults performMouseEventHitTest(
+    LocalFrame*,
+    const HitTestRequest&,
+    const PlatformMouseEvent&);
+
 }  // namespace EventHandlingUtil
 
 }  // namespace blink
 
 #endif  // EventHandlingUtil_h