Add functions searching a word boundary without VisualPosition to HTMLTextFormControlElement.

Source/core/rendering/RenderTreeAsText.h

Index: Source/core/rendering/RenderTreeAsText.h
diff --git a/Source/core/rendering/RenderTreeAsText.h b/Source/core/rendering/RenderTreeAsText.h
index aa66a867604ae035e1f5d53bc5f8c919677f1f0d..25a67fcd1438f2414051c5a8bd51c6aef15f678b 100644
--- a/Source/core/rendering/RenderTreeAsText.h
+++ b/Source/core/rendering/RenderTreeAsText.h
@@ -32,8 +32,9 @@
 namespace WebCore {
 
 class Element;
-class LocalFrame;
 class LayoutRect;
+class LocalFrame;
+class Node;
 class RenderLayer;
 class RenderObject;
 class TextStream;
@@ -72,6 +73,8 @@ String counterValueForElement(Element*);
 
 String markerTextForListItem(Element*);
 
+String nodePositionAsStringForTesting(Node*);
+
 } // namespace WebCore
 
 #endif // RenderTreeAsText_h