Remove deprecated_internalProblem.

pkg/front_end/lib/src/fasta/builder/class_builder.dart

Index: pkg/front_end/lib/src/fasta/builder/class_builder.dart
diff --git a/pkg/front_end/lib/src/fasta/builder/class_builder.dart b/pkg/front_end/lib/src/fasta/builder/class_builder.dart
index 7e64fda6e281f2c2fcd570e8c0d5e979f87c2e79..f3cd77a21662820beb1546cb6e0dcb9ff9ef858f 100644
--- a/pkg/front_end/lib/src/fasta/builder/class_builder.dart
+++ b/pkg/front_end/lib/src/fasta/builder/class_builder.dart
@@ -4,7 +4,7 @@
 
 library fasta.class_builder;
 
-import '../deprecated_problems.dart' show deprecated_internalProblem;
+import '../problems.dart' show internalProblem;
 
 import 'builder.dart'
     show
@@ -21,7 +21,11 @@ import 'builder.dart'
         TypeDeclarationBuilder,
         TypeVariableBuilder;
 
-import '../fasta_codes.dart' show Message;
+import '../fasta_codes.dart'
+    show
+        Message,
+        templateInternalProblemNotFoundIn,
+        templateInternalProblemSuperclassNotFound;
 
 abstract class ClassBuilder<T extends TypeBuilder, R>
     extends TypeDeclarationBuilder<T, R> {
@@ -166,10 +170,11 @@ abstract class ClassBuilder<T extends TypeBuilder, R>
         }
         supertype = t.supertype;
       } else {
-        deprecated_internalProblem(
-            "Superclass not found '${superclass.fullNameForErrors}'.",
-            fileUri,
-            charOffset);
+        internalProblem(
+            templateInternalProblemSuperclassNotFound
+                .withArguments(superclass.fullNameForErrors),
+            charOffset,
+            fileUri);
       }
       if (variables != null) {
         Map<TypeVariableBuilder, TypeBuilder> directSubstitutionMap =
@@ -197,7 +202,11 @@ abstract class ClassBuilder<T extends TypeBuilder, R>
   MemberBuilder operator [](String name) {
     // TODO(ahe): Rename this to getLocalMember.
     return scope.local[name] ??
-        deprecated_internalProblem("Not found: '$name'.");
+        internalProblem(
+            templateInternalProblemNotFoundIn.withArguments(
+                name, fullNameForErrors),
+            -1,
+            null);
   }
 
   void addCompileTimeError(Message message, int charOffset) {