SkPDF: Implement drawImage*() properly

tests/PDFJpegEmbedTest.cpp

 /*
  * Copyright 2014 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkDocument.h"
 #include "SkCanvas.h"
 #include "SkImageGenerator.h"
@@ skipping 103 matching lines @@
         }
         if (!isJfif) {
             continue;  // not applicable
         }
         if (kTests[i].type != info.fType) {
             ERRORF(r, "%s failed jfif type test", kTests[i].path);
             continue;
         }
         if (r->verbose()) {
             SkDebugf("\nJpegIdentification: %s [%d x %d]\n", kTests[i].path,
-                     info.fWidth, info.fHeight);
+                     info.fSize.width(), info.fSize.height());
         }
     }
 }