Dart: Renames dart:mojo_blah -> mojo:blah

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 3cd5bb5b4627d14114fa6b7e9e88222f14678c3f..d57ea814eb31a2999c8c1c040eb616564af699c2 100644
--- a/sky/engine/bindings/builtin.cc
+++ b/sky/engine/bindings/builtin.cc
@@ -27,8 +27,8 @@ 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},
+    {"mojo:bindings", false, nullptr, nullptr},
+    {"mojo:core", true, MojoNativeSymbol, MojoNativeLookup},
 };
 
 }  // namespace