Allow form inputs to be potential cluster roots.

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 0844ee43687ab92a6dc40fea618cda23af81f61b..21c55e43c7f42f6755bc915c27278c377ccc7260 100644
--- a/Source/core/rendering/FastTextAutosizer.cpp
+++ b/Source/core/rendering/FastTextAutosizer.cpp
@@ -158,9 +158,6 @@ static bool isPotentialClusterRoot(const RenderObject* renderer)
         return false;
     if (renderer->isListItem())
         return (renderer->isFloating() || renderer->isOutOfFlowPositioned());
-    // Avoid creating containers for text within form input.
-    if (isNonTextAreaFormControl(renderer->parent()))
-        return false;
 
     return true;
 }