Column balancing refactoring. Don't propagate data during layout.

third_party/WebKit/Source/core/layout/LayoutMultiColumnSet.cpp

 /*
  * Copyright (C) 2012 Apple Inc.  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.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 201 matching lines @@
 void LayoutMultiColumnSet::updateMinimumColumnHeight(LayoutUnit offsetInFlowThread, LayoutUnit height)
 {
     fragmentainerGroupAtFlowThreadOffset(offsetInFlowThread).updateMinimumColumnHeight(height);
 }
 
 LayoutUnit LayoutMultiColumnSet::pageLogicalTopForOffset(LayoutUnit offset) const
 {
     return fragmentainerGroupAtFlowThreadOffset(offset).columnLogicalTopForOffset(offset);
 }
 
-void LayoutMultiColumnSet::addContentRun(LayoutUnit endOffsetFromFirstPage)
-{
-    if (!heightIsAuto())
-        return;
-    fragmentainerGroupAtFlowThreadOffset(endOffsetFromFirstPage).addContentRun(endOffsetFromFirstPage);
-}
-
 bool LayoutMultiColumnSet::recalculateColumnHeight(BalancedColumnHeightCalculation calculationMode)
 {
     bool changed = false;
     for (auto& group : m_fragmentainerGroups)
         changed = group.recalculateColumnHeight(calculationMode) || changed;
     return changed;
 }
 
-void LayoutMultiColumnSet::recordSpaceShortage(LayoutUnit offsetInFlowThread, LayoutUnit spaceShortage)
-{
-    MultiColumnFragmentainerGroup& row = fragmentainerGroupAtFlowThreadOffset(offsetInFlowThread);
-    row.recordSpaceShortage(spaceShortage);
-
-    // Since we're at a potential break here, take the opportunity to check if we need another
-    // fragmentainer group. If we've run out of columns in the last fragmentainer group (column
-    // row), we need to insert another fragmentainer group to hold more columns.
-    if (!row.isLastGroup())
-        return;
-    LayoutMultiColumnFlowThread* flowThread = multiColumnFlowThread();
-    if (!flowThread->multiColumnBlockFlow()->isInsideFlowThread())
-        return; // Early bail. We're not nested, so waste no more time on this.
-    if (!flowThread->isInInitialLayoutPass())
-        return;
-    // Move the offset to where the next column starts, if we're not there already.
-    offsetInFlowThread += flowThread->pageRemainingLogicalHeightForOffset(offsetInFlowThread, AssociateWithFormerPage);
-
-    flowThread->appendNewFragmentainerGroupIfNeeded(offsetInFlowThread);
-}
-
 void LayoutMultiColumnSet::resetColumnHeight()
 {
     m_fragmentainerGroups.deleteExtraGroups();
     m_fragmentainerGroups.first().resetColumnHeight();
 }
 
 void LayoutMultiColumnSet::beginFlow(LayoutUnit offsetInFlowThread)
 {
     // At this point layout is exactly at the beginning of this set. Store block offset from flow
     // thread start.
@@ skipping 113 matching lines @@
 
 LayoutRect LayoutMultiColumnSet::flowThreadPortionRect() const
 {
     LayoutRect portionRect(LayoutUnit(), logicalTopInFlowThread(), pageLogicalWidth(), logicalHeightInFlowThread());
     if (!isHorizontalWritingMode())
         return portionRect.transposedRect();
     return portionRect;
 }
 
 }