[New Multicolumn] Cleanup: Remove redundant members.

Source/core/rendering/RenderBlockFlow.cpp

Index: Source/core/rendering/RenderBlockFlow.cpp
diff --git a/Source/core/rendering/RenderBlockFlow.cpp b/Source/core/rendering/RenderBlockFlow.cpp
index 82aa6698792feb00e12d7e2c5573b0f51c7692c7..90c06161b44afb9f7bea2c23854681ecc216dde9 100644
--- a/Source/core/rendering/RenderBlockFlow.cpp
+++ b/Source/core/rendering/RenderBlockFlow.cpp
@@ -185,7 +185,7 @@ bool RenderBlockFlow::updateLogicalWidthAndColumnWidth()
 {
     bool relayoutChildren = RenderBlock::updateLogicalWidthAndColumnWidth();
     if (RenderMultiColumnFlowThread* flowThread = multiColumnFlowThread()) {
-        if (flowThread->computeColumnCountAndWidth())
+        if (flowThread->needsNewWidth())
             return true;
     }
     return relayoutChildren;