Handle missing imports/exports/parts.

sdk/lib/_internal/compiler/implementation/warnings.dart

Index: sdk/lib/_internal/compiler/implementation/warnings.dart
diff --git a/sdk/lib/_internal/compiler/implementation/warnings.dart b/sdk/lib/_internal/compiler/implementation/warnings.dart
index 803d5a94e8eab247ccd147ea669a5fc0d887d953..7edacfa713aa3903416944abe9d4c2f40b38376e 100644
--- a/sdk/lib/_internal/compiler/implementation/warnings.dart
+++ b/sdk/lib/_internal/compiler/implementation/warnings.dart
@@ -631,6 +631,16 @@ Error: "#{value}" is not a valid Symbol name because is not:
   static const MessageKind PACKAGE_ROOT_NOT_SET = const MessageKind(
       'Error: Cannot resolve "#{uri}". Package root has not been set.');
 
+  static const MessageKind INTERNAL_LIBRARY_FROM = const MessageKind(

[ahe, 2013/08/20 10:18:16]

Could you add an example for this as well?

+      'Error: Internal library "#{resolvedUri}" is not accessible from '
+      '"#{importingUri}".');
+
+  static const MessageKind INTERNAL_LIBRARY = const MessageKind(
+      'Error: Internal library "#{resolvedUri}" is not accessible.');

[ahe, 2013/08/20 10:18:16]

Ditto.

+
+  static const MessageKind LIBRARY_NOT_FOUND = const MessageKind(
+      'Error: Library not found "#{resolvedUri}".');

[ahe, 2013/08/20 10:18:16]

Ditto.

+
   static const MessageKind UNSUPPORTED_EQ_EQ_EQ = const MessageKind(
       'Error: "===" is not an operator. '
       'Did you mean "#{lhs} == #{rhs}" or "identical(#{lhs}, #{rhs})"?');
@@ -742,6 +752,16 @@ import 'dart:mirrors';
 main() {}
 """]);
 
+  static const MessageKind READ_SCRIPT_ERROR = const MessageKind(
+      "Error: Can't read '#{uri}' (#{exception}).",

[ahe, 2013/08/20 10:18:16]

howToFix?

+      examples: const [
+          """
+// 'foo.dart' does not exist.
+import 'foo.dart';
+
+main() {}
+"""]);
+
   static const MessageKind COMPILER_CRASHED = const MessageKind(
       'Error: The compiler crashed when compiling this element.');