Create an autosizing layout scope in RenderGrid.

Source/core/rendering/RenderGrid.cpp

 /*
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 #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"
 #include "core/rendering/style/GridCoordinate.h"
 #include "platform/LengthFunctions.h"
 
 namespace WebCore {
 
 static const int infinity = -1;
 
@@ skipping 258 matching lines @@
     // FIXME: Much of this method is boiler plate that matches RenderBox::layoutBlock and Render*FlexibleBox::layoutBlock.
     // It would be nice to refactor some of the duplicate code.
     LayoutRepainter repainter(*this, checkForRepaintDuringLayout());
     LayoutStateMaintainer statePusher(*this, locationOffset());
 
     LayoutSize previousSize = size();
 
     setLogicalHeight(0);
     updateLogicalWidth();
 
+    FastTextAutosizer::LayoutScope fastTextAutosizerLayoutScope(this);
+
     layoutGridItems();
 
     LayoutUnit oldClientAfterEdge = clientLogicalBottom();
     updateLogicalHeight();
 
     if (size() != previousSize)
         relayoutChildren = true;
 
     layoutPositionedObjects(relayoutChildren || isDocumentElement());
 
@@ skipping 942 matching lines @@
     if (isOutOfFlowPositioned())
         return "RenderGrid (positioned)";
     if (isAnonymous())
         return "RenderGrid (generated)";
     if (isRelPositioned())
         return "RenderGrid (relative positioned)";
     return "RenderGrid";
 }
 
 } // namespace WebCore