pdfviewer: add virtual destructor for SkPdfFont

experimental/PdfViewer/SkPdfFont.h

 #ifndef __DEFINED__SkPdfFont
 #define __DEFINED__SkPdfFont
 
 #include "SkPdfHeaders_autogen.h"
 #include "SkPdfMapper_autogen.h"
 
 #include <map>
 #include <string>
 
 #include "SkTypeface.h"
@@ skipping 146 matching lines @@
 class SkPdfFont {
 public:
     SkPdfFont* fBaseFont;
     SkPdfEncoding* fEncoding;
     SkPdfToUnicode* fToUnicode;
 
 
 public:
     SkPdfFont() : fBaseFont(NULL), fEncoding(SkPdfDefaultEncoding::instance()), fToUnicode(NULL) {}
 
+    virtual ~SkPdfFont() {
+        // TODO(edisonn): NYI (will leak for now)
+    }
+
     const SkPdfEncoding* encoding() const {return fEncoding;}
 
     void drawText(const SkDecodedText& text, SkPaint* paint, PdfContext* pdfContext, SkCanvas* canvas) {
         for (int i = 0 ; i < text.size(); i++) {
             double width = drawOneChar(text[i], paint, pdfContext, canvas);
             pdfContext->fGraphicsState.fMatrixTm.preTranslate(SkDoubleToScalar(width), SkDoubleToScalar(0.0));
             canvas->translate(SkDoubleToScalar(width), SkDoubleToScalar(0.0));
         }
     }
 
@@ skipping 234 matching lines @@
                              SkDoubleToScalar(0.0));
         return fChars[ch - fFirstChar].fWidth;
     }
 
     virtual void afterWord(SkPaint* paint, SkMatrix* matrix) {
 
     }
 };
 
 #endif  // __DEFINED__SkPdfFont