Add TypedData instance kinds.

runtime/vm/json_stream.h

Index: runtime/vm/json_stream.h
diff --git a/runtime/vm/json_stream.h b/runtime/vm/json_stream.h
index 4a061787afa18840eb60cb1ff690dfc7ffebcbd2..56732cec9a824223e3023c6039e037d55e09aee5 100644
--- a/runtime/vm/json_stream.h
+++ b/runtime/vm/json_stream.h
@@ -116,6 +116,7 @@ class JSONStream : ValueObject {
   void PrintValue(intptr_t i);
   void PrintValue64(int64_t i);
   void PrintValue(double d);
+  void PrintValueBase64(const uint8_t* bytes, intptr_t length);
   void PrintValue(const char* s);
   void PrintValue(const char* s, intptr_t len);
   void PrintValueNoEscape(const char* s);
@@ -133,6 +134,9 @@ class JSONStream : ValueObject {
   void PrintProperty(const char* name, intptr_t i);
   void PrintProperty64(const char* name, int64_t i);
   void PrintProperty(const char* name, double d);
+  void PrintPropertyBase64(const char* name,
+                           const uint8_t* bytes,
+                           intptr_t length);
   void PrintProperty(const char* name, const char* s);
   bool PrintPropertyStr(const char* name, const String& s, intptr_t limit);
   void PrintPropertyNoEscape(const char* name, const char* s);
@@ -209,6 +213,11 @@ class JSONObject : public ValueObject {
   void AddProperty(const char* name, double d) const {
     stream_->PrintProperty(name, d);
   }
+  void AddPropertyBase64(const char* name,
+                         const uint8_t* bytes,
+                         intptr_t length) const {
+    stream_->PrintPropertyBase64(name, bytes, length);
+  }
   void AddProperty(const char* name, const char* s) const {
     stream_->PrintProperty(name, s);
   }