We don't flatten or unflatten SkPaintOptionsAndroid. Reproduce and fix.

src/core/SkPaint.cpp

Index: src/core/SkPaint.cpp
diff --git a/src/core/SkPaint.cpp b/src/core/SkPaint.cpp
index df8b292cedf2e5c69549e359a473397334c543af..62d09d659cb1518358fe58f654b94a5a3753eb37 100644
--- a/src/core/SkPaint.cpp
+++ b/src/core/SkPaint.cpp
@@ -2045,8 +2045,6 @@ void SkPaint::flatten(SkFlattenableWriteBuffer& buffer) const {
         ptr = write_scalar(ptr, this->getTextSize());
         ptr = write_scalar(ptr, this->getTextScaleX());
         ptr = write_scalar(ptr, this->getTextSkewX());
-        // Dummy value for obsolete hinting scale factor.  TODO: remove with next picture version
-        ptr = write_scalar(ptr, SK_Scalar1);
         ptr = write_scalar(ptr, this->getStrokeWidth());
         ptr = write_scalar(ptr, this->getStrokeMiter());
         *ptr++ = this->getColor();
@@ -2063,8 +2061,6 @@ void SkPaint::flatten(SkFlattenableWriteBuffer& buffer) const {
         buffer.writeScalar(fTextSize);
         buffer.writeScalar(fTextScaleX);
         buffer.writeScalar(fTextSkewX);
-        // Dummy value for obsolete hinting scale factor.  TODO: remove with next picture version
-        buffer.writeScalar(SK_Scalar1);
         buffer.writeScalar(fWidth);
         buffer.writeScalar(fMiterLimit);
         buffer.writeColor(fColor);
@@ -2095,6 +2091,10 @@ void SkPaint::flatten(SkFlattenableWriteBuffer& buffer) const {
         buffer.writeFlattenable(this->getImageFilter());
         buffer.writeFlattenable(this->getAnnotation());
     }
+
+#if SK_BUILD_FOR_ANDROID
+    this->getPaintOptionsAndroid().flatten(buffer);
+#endif
 }
 
 void SkPaint::unflatten(SkFlattenableReadBuffer& buffer) {
@@ -2110,8 +2110,6 @@ void SkPaint::unflatten(SkFlattenableReadBuffer& buffer) {
         this->setTextSize(read_scalar(pod));
         this->setTextScaleX(read_scalar(pod));
         this->setTextSkewX(read_scalar(pod));
-        // Skip the hinting scalar factor, which is not supported.
-        read_scalar(pod);
         this->setStrokeWidth(read_scalar(pod));
         this->setStrokeMiter(read_scalar(pod));
         this->setColor(*pod++);
@@ -2138,8 +2136,6 @@ void SkPaint::unflatten(SkFlattenableReadBuffer& buffer) {
         this->setTextSize(buffer.readScalar());
         this->setTextScaleX(buffer.readScalar());
         this->setTextSkewX(buffer.readScalar());
-        // Skip the hinting scalar factor, which is not supported.
-        buffer.readScalar();
         this->setStrokeWidth(buffer.readScalar());
         this->setStrokeMiter(buffer.readScalar());
         this->setColor(buffer.readColor());
@@ -2180,6 +2176,11 @@ void SkPaint::unflatten(SkFlattenableReadBuffer& buffer) {
         this->setLooper(NULL);
         this->setImageFilter(NULL);
     }
+#if SK_BUILD_FOR_ANDROID
+    SkPaintOptionsAndroid options;
+    options.unflatten(buffer);
+    this->setPaintOptionsAndroid(options);
+#endif
 }
 
 ///////////////////////////////////////////////////////////////////////////////