Move LayoutDeprecatedFlexibleBox-specific line handling.

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

 /*
  * Copyright (C) 2013 Google 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 1916 matching lines @@
 }
 
 void LayoutBlockFlow::deleteLineBoxTree()
 {
     if (containsFloats())
         m_floatingObjects->clearLineBoxTreePointers();
 
     m_lineBoxes.deleteLineBoxTree();
 }
 
+int LayoutBlockFlow::lineCount(const RootInlineBox* stopRootInlineBox) const
+{
+#ifndef NDEBUG
+    ASSERT(!stopRootInlineBox || stopRootInlineBox->block().debugPointer() == this);
+#endif
+    if (!childrenInline())
+        return 0;
+
+    int count = 0;
+    for (const RootInlineBox* box = firstRootBox(); box; box = box->nextRootBox()) {
+        count++;
+        if (box == stopRootInlineBox)
+            break;
+    }
+    return count;
+}
+
 void LayoutBlockFlow::removeFloatingObjectsFromDescendants()
 {
     if (!containsFloats())
         return;
     removeFloatingObjects();
     setChildNeedsLayout(MarkOnlyThis);
 
     // If our children are inline, then the only boxes which could contain floats are atomic inlines (e.g. inline-block, float etc.)
     // and these create formatting contexts, so can't pick up intruding floats from ancestors/siblings - making them safe to skip.
     if (childrenInline())
@@ skipping 1153 matching lines @@
     // FIXME: Glyph overflow will get lost in this case, but not really a big deal.
     GlyphOverflowAndFallbackFontsMap textBoxDataMap;
     for (ListHashSet<RootInlineBox*>::const_iterator it = lineBoxes.begin(); it != lineBoxes.end(); ++it) {
         RootInlineBox* box = *it;
         box->computeOverflow(box->lineTop(), box->lineBottom(), textBoxDataMap);
     }
     return childrenOverflowChanged;
 }
 
 } // namespace blink