Put LayoutAnalyzer back behind disabled-by-default-blink.debug.layout.

Source/core/layout/LayoutBlockFlow.cpp

Index: Source/core/layout/LayoutBlockFlow.cpp
diff --git a/Source/core/layout/LayoutBlockFlow.cpp b/Source/core/layout/LayoutBlockFlow.cpp
index 5ece6aab66c4ff8a38ed5a56973598e07c41d69b..7bf94e5dd91b4a7196b30ea83cd9a3c452827600 100644
--- a/Source/core/layout/LayoutBlockFlow.cpp
+++ b/Source/core/layout/LayoutBlockFlow.cpp
@@ -381,7 +381,8 @@ void LayoutBlockFlow::layoutBlock(bool relayoutChildren)
     if (isHTMLDialogElement(node()) && isOutOfFlowPositioned())
         positionDialog();
 
-    frameView()->layoutAnalyzer().increment((frameRect() == prevRect) ? LayoutAnalyzer::LayoutBlockRectangleDidNotChange : LayoutAnalyzer::LayoutBlockRectangleChanged);
+    if (frameView()->layoutAnalyzer())
+        frameView()->layoutAnalyzer()->increment((frameRect() == prevRect) ? LayoutAnalyzer::LayoutBlockRectangleDidNotChange : LayoutAnalyzer::LayoutBlockRectangleChanged);
 
     clearNeedsLayout();
 }