More cleanup in preparation for removing support for dart:scalarlist in the VM.

runtime/vm/snapshot_test.cc

Index: runtime/vm/snapshot_test.cc
===================================================================
--- runtime/vm/snapshot_test.cc	(revision 20532)
+++ runtime/vm/snapshot_test.cc	(working copy)
@@ -841,10 +841,10 @@
   const TokenStream& expected_tokens = TokenStream::Handle(script.tokens());
   const TokenStream& serialized_tokens =
       TokenStream::Handle(serialized_script.tokens());
-  const ExternalUint8Array& expected_data =
-      ExternalUint8Array::Handle(expected_tokens.GetStream());
-  const ExternalUint8Array& serialized_data =
-      ExternalUint8Array::Handle(serialized_tokens.GetStream());
+  const ExternalTypedData& expected_data =
+      ExternalTypedData::Handle(expected_tokens.GetStream());
+  const ExternalTypedData& serialized_data =
+      ExternalTypedData::Handle(serialized_tokens.GetStream());
   EXPECT_EQ(expected_data.Length(), serialized_data.Length());
   TokenStream::Iterator expected_iterator(expected_tokens, 0);
   TokenStream::Iterator serialized_iterator(serialized_tokens, 0);