change offset to xy for pixelref subsetting

dm/DMSerializeTask.cpp

Index: dm/DMSerializeTask.cpp
diff --git a/dm/DMSerializeTask.cpp b/dm/DMSerializeTask.cpp
index 8bc8c8ef98793560cfcf4ce56bb0ed9228f2bc23..3359f2e0aa77862c4008aae76d4850ce96a41797 100644
--- a/dm/DMSerializeTask.cpp
+++ b/dm/DMSerializeTask.cpp
@@ -19,21 +19,12 @@ SerializeTask::SerializeTask(const Task& parent,
     , fReference(reference)
     {}
 
-static SkData* trivial_bitmap_encoder(size_t* pixelRefOffset, const SkBitmap& bitmap) {
-    if (NULL == bitmap.pixelRef()) {
-        return NULL;
-    }
-    SkData* data = bitmap.pixelRef()->refEncodedData();
-    *pixelRefOffset = bitmap.pixelRefOffset();
-    return data;
-}
-
 void SerializeTask::draw() {
     SkPicture recorded;
     RecordPicture(fGM.get(), &recorded);
 
     SkDynamicMemoryWStream wStream;
-    recorded.serialize(&wStream, &trivial_bitmap_encoder);
+    recorded.serialize(&wStream, NULL);
     SkAutoTUnref<SkStream> rStream(wStream.detachAsStream());
     SkAutoTUnref<SkPicture> reconstructed(SkPicture::CreateFromStream(rStream));