support resolving .packages in FE

pkg/front_end/lib/src/fasta/fasta_codes_generated.dart

 // Copyright (c) 2017, 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.
 
 // NOTE: THIS FILE IS GENERATED. DO NOT EDIT.
 //
 // Instead modify 'pkg/front_end/messages.yaml' and run
 // 'pkg/front_end/tool/_fasta/generate_messages.dart' to update.
 
 part of fasta.codes;
@@ skipping 1544 matching lines @@
 
 // DO NOT EDIT. THIS FILE IS GENERATED. SEE TOP OF FILE.
 const MessageCode messageInvalidInlineFunctionType = const MessageCode(
     "InvalidInlineFunctionType",
     dart2jsCode: "INVALID_INLINE_FUNCTION_TYPE",
     message: r"""Invalid inline function type.""",
     tip:
         r"""Try changing the inline function type (as in 'int f()') to a prefixed function type using the `Function` keyword (as in 'int Function() f').""");
 
 // DO NOT EDIT. THIS FILE IS GENERATED. SEE TOP OF FILE.
+const Template<Message Function(Uri uri_, String string)>
+    templateInvalidPackagesFile =
+    const Template<Message Function(Uri uri_, String string)>(
+        messageTemplate: r"""Invalid .packages file '#uri':
+  #string.""", withArguments: _withArgumentsInvalidPackagesFile);
+
+// DO NOT EDIT. THIS FILE IS GENERATED. SEE TOP OF FILE.
+const Code<Message Function(Uri uri_, String string)> codeInvalidPackagesFile =
+    const Code<Message Function(Uri uri_, String string)>(
+  "InvalidPackagesFile",
+  templateInvalidPackagesFile,
+);
+
+// DO NOT EDIT. THIS FILE IS GENERATED. SEE TOP OF FILE.
+Message _withArgumentsInvalidPackagesFile(Uri uri_, String string) {
+  String uri = relativizeUri(uri_);
+  return new Message(codeInvalidPackagesFile,
+      message: """Invalid .packages file '$uri':
+  $string.""", arguments: {'uri': uri_, 'string': string});
+}
+
+// DO NOT EDIT. THIS FILE IS GENERATED. SEE TOP OF FILE.
 const Code<Null> codeInvalidSyncModifier = messageInvalidSyncModifier;
 
 // DO NOT EDIT. THIS FILE IS GENERATED. SEE TOP OF FILE.
 const MessageCode messageInvalidSyncModifier = const MessageCode(
     "InvalidSyncModifier",
     dart2jsCode: "INVALID_SYNC_MODIFIER",
     message: r"""Invalid modifier 'sync'.""",
     tip: r"""Try replacing 'sync' with 'sync*'.""");
 
 // DO NOT EDIT. THIS FILE IS GENERATED. SEE TOP OF FILE.
@@ skipping 127 matching lines @@
 );
 
 // DO NOT EDIT. THIS FILE IS GENERATED. SEE TOP OF FILE.
 Message _withArgumentsMissingInputFile(String string) {
   return new Message(codeMissingInputFile,
       message: """Input file not found: $string.""",
       arguments: {'string': string});
 }
 
 // DO NOT EDIT. THIS FILE IS GENERATED. SEE TOP OF FILE.
+const Code<Null> codeMissingInputs = messageMissingInputs;
+
+// DO NOT EDIT. THIS FILE IS GENERATED. SEE TOP OF FILE.
+const MessageCode messageMissingInputs = const MessageCode("MissingInputs",
+    message: r"""No input files provided to the compiler.""");
+
+// DO NOT EDIT. THIS FILE IS GENERATED. SEE TOP OF FILE.
 const Code<Null> codeMissingMain = messageMissingMain;
 
 // DO NOT EDIT. THIS FILE IS GENERATED. SEE TOP OF FILE.
 const MessageCode messageMissingMain = const MessageCode("MissingMain",
     dart2jsCode: "MISSING_MAIN",
     message: r"""No 'main' method found.""",
     tip: r"""Try adding a method named 'main' to your program.""");
 
 // DO NOT EDIT. THIS FILE IS GENERATED. SEE TOP OF FILE.
 const Template<
@@ skipping 1072 matching lines @@
         r"""'yield' can't be used as an identifier in 'async', 'async*', or 'sync*' methods.""");
 
 // DO NOT EDIT. THIS FILE IS GENERATED. SEE TOP OF FILE.
 const Code<Null> codeYieldNotGenerator = messageYieldNotGenerator;
 
 // DO NOT EDIT. THIS FILE IS GENERATED. SEE TOP OF FILE.
 const MessageCode messageYieldNotGenerator = const MessageCode(
     "YieldNotGenerator",
     dart2jsCode: "*ignored*",
     message: r"""'yield' can only be used in 'sync*' or 'async*' methods.""");