[FastTextAutosizer] Fix the inline overlap issue.

Source/core/rendering/FastTextAutosizer.cpp

Index: Source/core/rendering/FastTextAutosizer.cpp
diff --git a/Source/core/rendering/FastTextAutosizer.cpp b/Source/core/rendering/FastTextAutosizer.cpp
index 2297eab82cfa99a17ede246e92ac51458e06cee2..06d0c4a41867f629ef37baa60c25cba655d7ab0b 100644
--- a/Source/core/rendering/FastTextAutosizer.cpp
+++ b/Source/core/rendering/FastTextAutosizer.cpp
@@ -412,6 +412,9 @@ void FastTextAutosizer::inflate(RenderBlock* block)
                 multiplier = cluster->m_autosize ? clusterMultiplier(cluster) : 1.0f;
             applyMultiplier(descendant, multiplier);
             applyMultiplier(descendant->parent(), multiplier); // Parent handles line spacing.
+            // FIXME: Investigate why MarkOnlyThis is sufficient.
+            if (descendant->parent()->isRenderInline())
+                descendant->setPreferredLogicalWidthsDirty(MarkOnlyThis);
         }
         descendant = descendant->nextInPreOrder(block);
     }