Remove deprecated_internalProblem.

pkg/front_end/lib/src/fasta/kernel/kernel_library_builder.dart

 // Copyright (c) 2016, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 library fasta.kernel_library_builder;
 
-import 'package:front_end/src/scanner/token.dart' show Token;
-
 import 'package:kernel/ast.dart';
 
 import 'package:kernel/clone.dart' show CloneVisitor;
 
-import '../deprecated_problems.dart' show deprecated_internalProblem;
+import '../../scanner/token.dart' show Token;
 
 import '../loader.dart' show Loader;
 
 import '../modifier.dart'
     show abstractMask, namedMixinApplicationMask, staticMask;
 
+import '../problems.dart' show unhandled;
+
+import '../source/source_class_builder.dart' show SourceClassBuilder;
+
 import '../source/source_library_builder.dart'
     show DeclarationBuilder, SourceLibraryBuilder;
 
-import '../source/source_class_builder.dart' show SourceClassBuilder;
-
 import '../util/relativize.dart' show relativizeUri;
 
 import 'kernel_builder.dart'
     show
-        deprecated_AccessErrorBuilder,
+        AccessErrorBuilder,
         Builder,
         BuiltinTypeBuilder,
         ClassBuilder,
         ConstructorReferenceBuilder,
         FormalParameterBuilder,
         InvalidTypeBuilder,
         KernelConstructorBuilder,
         KernelEnumBuilder,
         KernelFieldBuilder,
         KernelFormalParameterBuilder,
@@ skipping 628 matching lines @@
       library.addMember(builder.build(this)..isStatic = true);
     } else if (builder is KernelFunctionTypeAliasBuilder) {
       library.addTypedef(builder.build(this));
     } else if (builder is KernelEnumBuilder) {
       library.addClass(builder.build(this, coreLibrary));
     } else if (builder is PrefixBuilder) {
       // Ignored. Kernel doesn't represent prefixes.
     } else if (builder is BuiltinTypeBuilder) {
       // Nothing needed.
     } else {
-      deprecated_internalProblem("Unhandled builder: ${builder.runtimeType}");
+      unhandled("${builder.runtimeType}", "buildBuilder", builder.charOffset,
+          builder.fileUri);
     }
   }
 
   @override
   Library build(LibraryBuilder coreLibrary) {
     super.build(coreLibrary);
     library.name = name;
     library.procedures.sort(compareProcedures);
     return library;
   }
 
   @override
   Builder buildAmbiguousBuilder(
       String name, Builder builder, Builder other, int charOffset,
       {bool isExport: false, bool isImport: false}) {
     // TODO(ahe): Can I move this to Scope or Prefix?
     if (builder == other) return builder;
     if (builder is InvalidTypeBuilder) return builder;
     if (other is InvalidTypeBuilder) return other;
-    if (builder is deprecated_AccessErrorBuilder) {
-      deprecated_AccessErrorBuilder error = builder;
+    if (builder is AccessErrorBuilder) {
+      AccessErrorBuilder error = builder;
       builder = error.builder;
     }
-    if (other is deprecated_AccessErrorBuilder) {
-      deprecated_AccessErrorBuilder error = other;
+    if (other is AccessErrorBuilder) {
+      AccessErrorBuilder error = other;
       other = error.builder;
     }
     bool isLocal = false;
     Builder preferred;
     Uri uri;
     Uri otherUri;
     Uri preferredUri;
     Uri hiddenUri;
     if (scope.local[name] == builder) {
       isLocal = true;
@@ skipping 144 matching lines @@
           mixinApplicationClasses.putIfAbsent(name, () => builder);
       if (existing != builder) {
         part.scope.local.remove(name);
       }
     });
     super.includePart(part);
     nativeMethods.addAll(part.nativeMethods);
     boundlessTypeVariables.addAll(part.boundlessTypeVariables);
   }
 }