Check for null StringImpl in blockIsRowOfLinks.

Source/core/rendering/TextAutosizer.cpp

Index: Source/core/rendering/TextAutosizer.cpp
diff --git a/Source/core/rendering/TextAutosizer.cpp b/Source/core/rendering/TextAutosizer.cpp
index 5993a47724c610da351fe2a45b56cd5b7efb0911..226c2894214abbd795d09dd63e2337002984b9a1 100644
--- a/Source/core/rendering/TextAutosizer.cpp
+++ b/Source/core/rendering/TextAutosizer.cpp
@@ -194,7 +194,7 @@ static bool blockIsRowOfLinks(const RenderBlock* block)
 
     while (renderer) {
         if (!isPotentialClusterRoot(renderer)) {
-            if (renderer->isText() && toRenderText(renderer)->text().impl()->stripWhiteSpace()->length() > 3)
+            if (renderer->isText() && toRenderText(renderer)->text().stripWhiteSpace().length() > 3)
                 return false;
             if (!renderer->isInline() || renderer->isBR())
                 return false;