Extract more of the mouse logic from EventHandler

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

Index: third_party/WebKit/Source/core/input/EventHandlingUtil.h
diff --git a/third_party/WebKit/Source/core/input/EventHandlingUtil.h b/third_party/WebKit/Source/core/input/EventHandlingUtil.h
index 1e11ebd090d9b6e2be3a63118a344e97cd00cad0..8c78577b392652be6489f1ab891ccf2ab5d8bcc6 100644
--- a/third_party/WebKit/Source/core/input/EventHandlingUtil.h
+++ b/third_party/WebKit/Source/core/input/EventHandlingUtil.h
@@ -7,7 +7,10 @@
 
 #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"
 #include "public/platform/WebInputEventResult.h"
 
 namespace blink {
@@ -22,6 +25,18 @@ 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 prepareMouseEvent(LocalFrame*,
+    const HitTestRequest&, const PlatformMouseEvent&);
+
 } // namespace EventHandlingUtil
 
 } // namespace blink