Add functions searching a word boundary without VisualPosition to HTMLTextFormControlElement.

Source/core/rendering/RenderTreeAsText.cpp

Index: Source/core/rendering/RenderTreeAsText.cpp
diff --git a/Source/core/rendering/RenderTreeAsText.cpp b/Source/core/rendering/RenderTreeAsText.cpp
index e0492ba0c3461179e29f89079f46923c74cfde1e..20e2ef2c3943b659c1ad3a0b13ab58f68bdefb45 100644
--- a/Source/core/rendering/RenderTreeAsText.cpp
+++ b/Source/core/rendering/RenderTreeAsText.cpp
@@ -636,7 +636,7 @@ void RenderTreeAsText::writeLayers(TextStream& ts, const RenderLayer* rootLayer,
     }
 }
 
-static String nodePosition(Node* node)
+String nodePositionAsStringForTesting(Node* node)
 {
     StringBuilder result;
 
@@ -683,13 +683,14 @@ static void writeSelection(TextStream& ts, const RenderObject* o)
 
     VisibleSelection selection = frame->selection().selection();
     if (selection.isCaret()) {
-        ts << "caret: position " << selection.start().deprecatedEditingOffset() << " of " << nodePosition(selection.start().deprecatedNode());
+        ts << "caret: position " << selection.start().deprecatedEditingOffset() << " of " << nodePositionAsStringForTesting(selection.start().deprecatedNode());
         if (selection.affinity() == UPSTREAM)
             ts << " (upstream affinity)";
         ts << "\n";
-    } else if (selection.isRange())
-        ts << "selection start: position " << selection.start().deprecatedEditingOffset() << " of " << nodePosition(selection.start().deprecatedNode()) << "\n"
-           << "selection end:   position " << selection.end().deprecatedEditingOffset() << " of " << nodePosition(selection.end().deprecatedNode()) << "\n";
+    } else if (selection.isRange()) {
+        ts << "selection start: position " << selection.start().deprecatedEditingOffset() << " of " << nodePositionAsStringForTesting(selection.start().deprecatedNode()) << "\n"
+            << "selection end:   position " << selection.end().deprecatedEditingOffset() << " of " << nodePositionAsStringForTesting(selection.end().deprecatedNode()) << "\n";
+    }
 }
 
 static String externalRepresentation(RenderBox* renderer, RenderAsTextBehavior behavior)