Move markLinesDirtyInBlockRange() from LayoutBlock to LayoutBlockFlow.

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

Index: third_party/WebKit/Source/core/layout/LayoutBlockFlowLine.cpp
diff --git a/third_party/WebKit/Source/core/layout/LayoutBlockFlowLine.cpp b/third_party/WebKit/Source/core/layout/LayoutBlockFlowLine.cpp
index ec62c97eecfe87692ead5f08ab49bd496f63c7ef..c1b06e53319815d28082de5f9749d58f024c5a7e 100644
--- a/third_party/WebKit/Source/core/layout/LayoutBlockFlowLine.cpp
+++ b/third_party/WebKit/Source/core/layout/LayoutBlockFlowLine.cpp
@@ -2016,6 +2016,24 @@ void LayoutBlockFlow::checkLinesForTextOverflow()
     }
 }
 
+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();