Refactor HitTestResult to store the HitTestRequest

Source/core/frame/LocalFrame.cpp

Index: Source/core/frame/LocalFrame.cpp
diff --git a/Source/core/frame/LocalFrame.cpp b/Source/core/frame/LocalFrame.cpp
index 71d68ddad4e82ebdc13dfc2fbf6ff8e1931d4d11..d1df87501934f303013b14f2afb593bf16f314b9 100644
--- a/Source/core/frame/LocalFrame.cpp
+++ b/Source/core/frame/LocalFrame.cpp
@@ -668,10 +668,10 @@ Document* LocalFrame::documentAtPoint(const IntPoint& pointInRootFrame)
         return nullptr;
 
     IntPoint pt = view()->rootFrameToContents(pointInRootFrame);
-    HitTestResult result = HitTestResult(pt);
 
-    if (contentRenderer())
-        result = eventHandler().hitTestResultAtPoint(pt, HitTestRequest::ReadOnly | HitTestRequest::Active);
+    if (!contentRenderer())
+        return nullptr;
+    HitTestResult result = eventHandler().hitTestResultAtPoint(pt, HitTestRequest::ReadOnly | HitTestRequest::Active);
     return result.innerNode() ? &result.innerNode()->document() : nullptr;
 }