Get rid of unused functions VisibleSelection::setBase and setExtent taking Position

third_party/WebKit/Source/core/editing/VisibleSelection.h

Index: third_party/WebKit/Source/core/editing/VisibleSelection.h
diff --git a/third_party/WebKit/Source/core/editing/VisibleSelection.h b/third_party/WebKit/Source/core/editing/VisibleSelection.h
index 6da5081cca6cba8d97f0f3f1f333d0fbd9f9d061..d5b0fabc2abac2c6b6097fd5517df03d015648f6 100644
--- a/third_party/WebKit/Source/core/editing/VisibleSelection.h
+++ b/third_party/WebKit/Source/core/editing/VisibleSelection.h
@@ -69,9 +69,7 @@ class CORE_TEMPLATE_CLASS_EXPORT VisibleSelectionTemplate {
   // TODO(yosin): To make |VisibleSelection| as immutable object, we should
   // get rid of |setBase()| and |setExtent()| by replacing them with
   // |createVisibleSelection()|.
-  void setBase(const PositionTemplate<Strategy>&);
   void setBase(const VisiblePositionTemplate<Strategy>&);
-  void setExtent(const PositionTemplate<Strategy>&);
   void setExtent(const VisiblePositionTemplate<Strategy>&);
 
   SelectionTemplate<Strategy> asSelection() const;