Prototype code that turns any/every flattenable into JSON

src/core/SkPictureFlat.h

Index: src/core/SkPictureFlat.h
diff --git a/src/core/SkPictureFlat.h b/src/core/SkPictureFlat.h
index cd750bffab2e5d890bfaa05a103472d75ec12b63..18fa4027710faa3e9521e2f7afa66c713801c99c 100644
--- a/src/core/SkPictureFlat.h
+++ b/src/core/SkPictureFlat.h
@@ -269,7 +269,7 @@ public:
     static SkFlatData* Create(SkFlatController* controller, const T& obj, int index) {
         // A buffer of 256 bytes should fit most paints, regions, and matrices.
         uint32_t storage[64];
-        SkWriteBuffer buffer(storage, sizeof(storage), controller->getWriteBufferFlags());
+        SkBinaryWriteBuffer buffer(storage, sizeof(storage), controller->getWriteBufferFlags());
 
         buffer.setBitmapHeap(controller->getBitmapHeap());
         buffer.setTypefaceRecorder(controller->getTypefaceSet());
@@ -544,7 +544,7 @@ private:
 
     // All SkFlatData* stored in fIndexedData and fHash are owned by the controller.
     SkAutoTUnref<SkFlatController> fController;
-    SkWriteBuffer fScratch;
+    SkBinaryWriteBuffer fScratch;
     bool fReady;
 
     // For index -> SkFlatData.  0-based, while all indices in the API are 1-based.  Careful!