Add missing (trivial) virtual destructors.

experimental/PdfViewer/SkPdfFont.h

 /*
  * Copyright 2013 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 // TODO(edisonn): this file not commented much on purpose.
 // It will probably need heavy refactoring soon anyway to support all encodings, fonts and
 // proper text sizing and spacing
@@ skipping 59 matching lines @@
     uint16_t* text;
     int len;
 
 public:
     unsigned int operator[](int i) const { return text[i]; }
     int size() const { return len; }
 };
 
 class SkPdfEncoding {
 public:
+    virtual ~SkPdfEncoding() {}
     virtual bool decodeText(const SkUnencodedText& textIn, SkDecodedText* textOut) const = 0;
     static SkPdfEncoding* fromName(const char* name);
 };
 
 SkTDict<SkPdfEncoding*>& getStandardEncodings();
 
 class SkPdfToUnicode {
     SkPdfNativeDoc* fParsed;
     // TODO(edisonn): hide public members
 public:
     unsigned short* fCMapEncoding;
     unsigned char* fCMapEncodingFlag;
 
     SkPdfToUnicode(SkPdfNativeDoc* parsed, SkPdfStream* stream);
 };
 
 
 class SkPdfIdentityHEncoding : public SkPdfEncoding {
 public:
+    virtual ~SkPdfIdentityHEncoding() {}
     virtual bool decodeText(const SkUnencodedText& textIn, SkDecodedText* textOut) const {
         // TODO(edisonn): SkASSERT(textIn.len % 2 == 0); or report error?
 
         uint16_t* text = (uint16_t*)textIn.text;
         textOut->text = new uint16_t[textIn.len / 2];
         textOut->len = textIn.len / 2;
 
         for (int i = 0; i < textOut->len; i++) {
             textOut->text[i] = ((text[i] << 8) & 0xff00) | ((text[i] >> 8) & 0x00ff);
         }
 
         return true;
     }
 
     static SkPdfIdentityHEncoding* instance() {
         static SkPdfIdentityHEncoding* inst = new SkPdfIdentityHEncoding();
         return inst;
     }
 };
 
 // TODO(edisonn): using this one when no encoding is specified
 class SkPdfDefaultEncoding : public SkPdfEncoding {
 public:
+    virtual ~SkPdfDefaultEncoding() {}
     virtual bool decodeText(const SkUnencodedText& textIn, SkDecodedText* textOut) const {
         // TODO(edisonn): SkASSERT(textIn.len % 2 == 0); or report error?
 
         unsigned char* text = (unsigned char*)textIn.text;
         textOut->text = new uint16_t[textIn.len];
         textOut->len = textIn.len;
 
         for (int i = 0; i < textOut->len; i++) {
             textOut->text[i] = text[i];
         }
 
         return true;
     }
 
     static SkPdfDefaultEncoding* instance() {
         static SkPdfDefaultEncoding* inst = new SkPdfDefaultEncoding();
         return inst;
     }
 };
 
 class SkPdfCIDToGIDMapIdentityEncoding : public SkPdfEncoding {
 public:
+    virtual ~SkPdfCIDToGIDMapIdentityEncoding() {}
     virtual bool decodeText(const SkUnencodedText& textIn, SkDecodedText* textOut) const {
         // TODO(edisonn): SkASSERT(textIn.len % 2 == 0); or report error?
 
         uint16_t* text = (uint16_t*)textIn.text;
         textOut->text = new uint16_t[textIn.len / 2];
         textOut->len = textIn.len / 2;
 
         for (int i = 0; i < textOut->len; i++) {
             textOut->text[i] = ((text[i] << 8) & 0xff00) | ((text[i] >> 8) & 0x00ff);
         }
@@ skipping 313 matching lines @@
                 SkDoubleToScalar(pdfContext->fGraphicsState.fCurFontSize *
                                      fChars[ch - fFirstChar].fWidth),
                 SkDoubleToScalar(0.0));
         return fChars[ch - fFirstChar].fWidth;
     }
 
     virtual void afterWord(SkPaint* paint, SkMatrix* matrix) {}
 };
 
 #endif  // SkPdfFont_DEFINED