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 "core/paint/PaintLayer.h"
 #include "platform/geometry/LayoutPoint.h"
+#include "platform/scroll/ScrollableArea.h"

[bokan, 2016/09/30 16:57:55]

These types should just be forward declared below and the header included in the
cpp. Adding includes into the header when unneeded can slow down compilation. 

[Navid Zolghadr, 2016/10/03 16:03:00]

Done.

 #include "public/platform/WebInputEventResult.h"
 
 namespace blink {
 
 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