[PDF] Rewind the font stream if font subsetting fails.

src/pdf/SkPDFFont.cpp

 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include <ctype.h>
 
 #include "SkData.h"
@@ skipping 564 matching lines @@
                                                      sk_delete_array,
                                                      NULL));
             subsetFontStream = new SkPDFStream(data.get());
             fontSize = subsetFontSize;
         }
     }
     if (subsetFontStream) {
         *fontStream = subsetFontStream;
         return fontSize;
     }
+    fontData->rewind();
 #else
     sk_ignore_unused_variable(fontName);
     sk_ignore_unused_variable(subset);
 #endif
 
     // Fail over: just embed the whole font.
     *fontStream = new SkPDFStream(fontData.get());
     return fontSize;
 }
 
@@ skipping 813 matching lines @@
 
     insert("FontBBox", makeFontBBox(bbox, 1000))->unref();
     insertInt("FirstChar", firstGlyphID());
     insertInt("LastChar", lastGlyphID());
     insert("Widths", widthArray.get());
     insertName("CIDToGIDMap", "Identity");
 
     populateToUnicodeTable(NULL);
     return true;
 }