Create an autosizing layout scope in RenderGrid.

Source/core/rendering/RenderGrid.cpp

Index: Source/core/rendering/RenderGrid.cpp
diff --git a/Source/core/rendering/RenderGrid.cpp b/Source/core/rendering/RenderGrid.cpp
index 163edcffe0754ba440f5c24fba58f1a10b62528a..7a7ee3bba081b31d6c9a2df8df1f61e7d1387c8e 100644
--- a/Source/core/rendering/RenderGrid.cpp
+++ b/Source/core/rendering/RenderGrid.cpp
@@ -26,6 +26,7 @@
 #include "config.h"
 #include "core/rendering/RenderGrid.h"
 
+#include "core/rendering/FastTextAutosizer.h"
 #include "core/rendering/LayoutRepainter.h"
 #include "core/rendering/RenderLayer.h"
 #include "core/rendering/RenderView.h"
@@ -304,6 +305,8 @@ void RenderGrid::layoutBlock(bool relayoutChildren)
     setLogicalHeight(0);
     updateLogicalWidth();
 
+    FastTextAutosizer::LayoutScope fastTextAutosizerLayoutScope(this);
+
     layoutGridItems();
 
     LayoutUnit oldClientAfterEdge = clientLogicalBottom();