Fix SkTypeface::serialize() on Mac by properly indicating local fonts

tests/FontHostStreamTest.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 "SkBitmap.h"
 #include "SkCanvas.h"
 #include "SkColor.h"
+#include "SkFontDescriptor.h"
 #include "SkFontHost.h"
 #include "SkGraphics.h"
 #include "SkPaint.h"
 #include "SkPoint.h"
 #include "SkRect.h"
 #include "SkStream.h"
 #include "SkTypeface.h"
 #include "SkTypes.h"
 #include "Test.h"
 
@@ skipping 70 matching lines @@
 
         SkTypeface* origTypeface = paint.getTypeface();
         SkAutoTUnref<SkTypeface> aur;
         if (NULL == origTypeface) {
             origTypeface = aur.reset(SkTypeface::RefDefault());
         }
 
         int ttcIndex;
         SkAutoTUnref<SkStream> fontData(origTypeface->openStream(&ttcIndex));
         SkTypeface* streamTypeface = SkTypeface::CreateFromStream(fontData);
+
+        SkFontDescriptor desc;
+        bool isLocalStream = false;
+        streamTypeface->getFontDescriptor(&desc, &isLocalStream);
+        REPORTER_ASSERT(reporter, isLocalStream);
+
         SkSafeUnref(paint.setTypeface(streamTypeface));
         drawBG(&streamCanvas);
         streamCanvas.drawPosText("A", 1, &point, paint);
 
         REPORTER_ASSERT(reporter,
                         compare(origBitmap, origRect, streamBitmap, streamRect));
     }
     //Make sure the typeface is deleted and removed.
     SkGraphics::PurgeFontCache();
 }