Convert SkWriter32 to use an SkTDArray for its internal storage.

src/core/SkPicturePlayback.cpp

Index: src/core/SkPicturePlayback.cpp
diff --git a/src/core/SkPicturePlayback.cpp b/src/core/SkPicturePlayback.cpp
index 97e566764b170cde28fb41e9d0bf4820b86bd301..27f0c58c6de9cf4d5ec6edc0c53bbb1b39769e79 100644
--- a/src/core/SkPicturePlayback.cpp
+++ b/src/core/SkPicturePlayback.cpp
@@ -438,8 +438,7 @@ void SkPicturePlayback::serialize(SkWStream* stream,
         SkRefCntSet  typefaceSet;
         SkFactorySet factSet;
 
-        SkOrderedWriteBuffer buffer(1024);
-
+        SkOrderedWriteBuffer buffer;
         buffer.setFlags(SkFlattenableWriteBuffer::kCrossProcess_Flag);
         buffer.setTypefaceRecorder(&typefaceSet);
         buffer.setFactoryRecorder(&factSet);