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 666e1974a8574fa1216e3d41ebe5d785a7ccccaa..558ae12dc8988460c665bad368236c6286fdf388 100644
--- a/third_party/WebKit/Source/core/input/EventHandlingUtil.h
+++ b/third_party/WebKit/Source/core/input/EventHandlingUtil.h
@@ -5,13 +5,17 @@
 #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(
@@ -24,6 +28,19 @@ 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