Refactor HitTestResult to store the HitTestRequest

Source/core/layout/LayoutFlowThread.cpp

 /*
  * Copyright (C) 2011 Adobe Systems Incorporated. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *
  * 1. Redistributions of source code must retain the above
  *    copyright notice, this list of conditions and the following
  *    disclaimer.
@@ skipping 105 matching lines @@
 {
     computedValues.m_position = logicalTop;
     computedValues.m_extent = 0;
 
     for (LayoutMultiColumnSetList::const_iterator iter = m_multiColumnSetList.begin(); iter != m_multiColumnSetList.end(); ++iter) {
         LayoutMultiColumnSet* columnSet = *iter;
         computedValues.m_extent += columnSet->logicalHeightInFlowThread();
     }
 }
 
-bool LayoutFlowThread::nodeAtPoint(const HitTestRequest& request, HitTestResult& result, const HitTestLocation& locationInContainer, const LayoutPoint& accumulatedOffset, HitTestAction hitTestAction)
+bool LayoutFlowThread::nodeAtPoint(HitTestResult& result, const HitTestLocation& locationInContainer, const LayoutPoint& accumulatedOffset, HitTestAction hitTestAction)
 {
     if (hitTestAction == HitTestBlockBackground)
         return false;
-    return LayoutBlockFlow::nodeAtPoint(request, result, locationInContainer, accumulatedOffset, hitTestAction);
+    return LayoutBlockFlow::nodeAtPoint(result, locationInContainer, accumulatedOffset, hitTestAction);
 }
 
 LayoutUnit LayoutFlowThread::pageLogicalHeightForOffset(LayoutUnit offset)
 {
     LayoutMultiColumnSet* columnSet = columnSetAtBlockOffset(offset);
     if (!columnSet)
         return 0;
 
     return columnSet->pageLogicalHeight();
 }
@@ skipping 72 matching lines @@
 
 void LayoutFlowThread::MultiColumnSetSearchAdapter::collectIfNeeded(const MultiColumnSetInterval& interval)
 {
     if (m_result)
         return;
     if (interval.low() <= m_offset && interval.high() > m_offset)
         m_result = interval.data();
 }
 
 } // namespace blink