Custom formatter cleanup Fix case where displaying a class constructor generated unreadable huge ou…

pkg/dev_compiler/tool/input_sdk/private/ddc_runtime/rtti.dart

Index: pkg/dev_compiler/tool/input_sdk/private/ddc_runtime/rtti.dart
diff --git a/pkg/dev_compiler/tool/input_sdk/private/ddc_runtime/rtti.dart b/pkg/dev_compiler/tool/input_sdk/private/ddc_runtime/rtti.dart
index 344c592fcd546a3ab4a87e9176c17d80cf61456d..52c3991c4f00bebcfc351a396354fa59c8ad849f 100644
--- a/pkg/dev_compiler/tool/input_sdk/private/ddc_runtime/rtti.dart
+++ b/pkg/dev_compiler/tool/input_sdk/private/ddc_runtime/rtti.dart
@@ -74,6 +74,8 @@ lazyFn(closure, computeType) {
 final _runtimeType = JS('', 'Symbol("_runtimeType")');
 final isNamedConstructor = JS('', 'Symbol("isNamedConstructor")');
 
+final dartLibraryName = JS('', 'Symbol("dartLibraryName")');
+
 _checkPrimitiveType(obj) {
   // TODO(jmesserly): JS is used to prevent type literal wrapping.  Is there a
   // better way we can handle this?  (sra: It is super dodgy that the values
@@ -187,9 +189,7 @@ unwrapType(WrappedType obj) => obj._wrappedType;
 
 _getRuntimeType(value) => JS('', '#[#]', value, _runtimeType);
 getIsNamedConstructor(value) => JS('', '#[#]', value, isNamedConstructor);
-// TODO(bmilligan): Define the symbol in rtti.dart instead of dart_library.js
-// and get rid of the call to dart_library in the JS here.
-getDartLibraryName(value) => JS('', '#[dart_library.dartLibraryName]', value);
+getDartLibraryName(value) => JS('', '#[#]', value, dartLibraryName);
 
 /// Tag the runtime type of [value] to be type [t].
 void tag(value, t) {