Move markLinesDirtyInBlockRange() from LayoutBlock to LayoutBlockFlow.

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

 /*
  * Copyright (C) 2000 Lars Knoll (knoll@kde.org)
  * Copyright (C) 2003, 2004, 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc. All right reserved.
  * Copyright (C) 2010 Google Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
@@ skipping 1998 matching lines @@
                 if (ltr)
                     curr->moveInInlineDirection(logicalLeft);
                 else
                     curr->moveInInlineDirection(logicalLeft - (availableLogicalWidth - totalLogicalWidth));
             }
         }
         indentText = DoNotIndentText;
     }
 }
 
+void LayoutBlockFlow::markLinesDirtyInBlockRange(LayoutUnit logicalTop, LayoutUnit logicalBottom, RootInlineBox* highest)
+{
+    if (logicalTop >= logicalBottom)
+        return;
+
+    RootInlineBox* lowestDirtyLine = lastRootBox();
+    RootInlineBox* afterLowest = lowestDirtyLine;
+    while (lowestDirtyLine && lowestDirtyLine->lineBottomWithLeading() >= logicalBottom && logicalBottom < LayoutUnit::max()) {
+        afterLowest = lowestDirtyLine;
+        lowestDirtyLine = lowestDirtyLine->prevRootBox();
+    }
+
+    while (afterLowest && afterLowest != highest && (afterLowest->lineBottomWithLeading() >= logicalTop || afterLowest->lineBottomWithLeading() < LayoutUnit())) {
+        afterLowest->markDirty();
+        afterLowest = afterLowest->prevRootBox();
+    }
+}
+
 LayoutUnit LayoutBlockFlow::startAlignedOffsetForLine(LayoutUnit position, IndentTextOrNot indentText)
 {
     ETextAlign textAlign = style()->textAlign();
 
     bool applyIndentText;
     switch (textAlign) { // FIXME: Handle TAEND here
     case LEFT:
     case WEBKIT_LEFT:
         applyIndentText = style()->isLeftToRightDirection();
         break;
@@ skipping 41 matching lines @@
     if (!line || !line->isFirstLineStyle())
         return reason;
     // It's the RootInlineBox that paints the ::first-line background. Note that since it may be
     // expensive to figure out if the first line is affected by any ::first-line selectors at all,
     // we just invalidate it unconditionally, since that's typically cheaper.
     invalidateDisplayItemClient(*line);
     return reason;
 }
 
 } // namespace blink