Prepare for development branch by updating externally-used API.

pkg/front_end/lib/src/fasta/source/outline_builder.dart

Index: pkg/front_end/lib/src/fasta/source/outline_builder.dart
diff --git a/pkg/front_end/lib/src/fasta/source/outline_builder.dart b/pkg/front_end/lib/src/fasta/source/outline_builder.dart
index 01c8502e7fe8b1917fa30f97cc4bfd014199940e..43f0f3b32c7aeadc929acbb1fd545608f519957d 100644
--- a/pkg/front_end/lib/src/fasta/source/outline_builder.dart
+++ b/pkg/front_end/lib/src/fasta/source/outline_builder.dart
@@ -788,6 +788,12 @@ class OutlineBuilder extends UnhandledListener {
   }
 
   @override
+  void addCompileTimeErrorFromMessage(FastaMessage message) {
+    library.addCompileTimeError(message.charOffset, message.message,
+        fileUri: message.uri);
+  }
+
+  @override
   Link<Token> handleMemberName(Link<Token> identifiers) {
     if (!isDartLibrary || identifiers.isEmpty) return identifiers;
     return removeNativeClause(identifiers);