Remove unimplemented BlockPainter::paintSelection.

This code is not implemented nor called. Discovered while digging into a
selection issue.

Review URL: https://codereview.chromium.org/1291253003

git-svn-id: svn://svn.chromium.org/blink/trunk@200851 bbb929c8-8fbe-4397-9dbb-9b2b20218538

third_party/WebKit/Source/core/paint/BlockPainter.h

@@ -39,7 +39,6 @@ private:
     bool hasCaret() const;
     void paintCarets(const PaintInfo&, const LayoutPoint&);
     void paintContents(const PaintInfo&, const LayoutPoint&);
-    void paintSelection(const PaintInfo&, const LayoutPoint&);
     void paintContinuationOutlines(const PaintInfo&, const LayoutPoint&);
 
     LayoutBlock& m_layoutBlock;