Dart: Removes all but native calls and the handle watcher from the snapshot.

sky/engine/bindings/builtin.cc

Index: sky/engine/bindings/builtin.cc
diff --git a/sky/engine/bindings/builtin.cc b/sky/engine/bindings/builtin.cc
index d6860c0823b38187c9e87eac53205562dee8b448..05161d5f97854085d29ebf2297a76ccf1446ba22 100644
--- a/sky/engine/bindings/builtin.cc
+++ b/sky/engine/bindings/builtin.cc
@@ -27,8 +27,7 @@ const LibraryDescriptor kBuiltinLibraries[] = {
     /* { url_, has_natives_, native_symbol_, native_resolver_ } */
     {"dart:sky_builtin", true, BuiltinNatives::NativeSymbol, BuiltinNatives::NativeLookup},
     {"dart:sky", true, skySnapshotSymbolizer, skySnapshotResolver},
-    {"dart:mojo.bindings", false, nullptr, nullptr},
-    {"dart:mojo.core", true, MojoNativeSymbol, MojoNativeLookup},
+    {"dart:mojo.internal", true, MojoNativeSymbol, MojoNativeLookup},
 };
 
 }  // namespace