Use BreakOutsideOfLoop instead of Unspecified

Change-Id: Ib420f7d2bb3c47da36f8fa81b4c2c09d319b74e7
Reviewed-on: https://dart-review.googlesource.com/65205
Reviewed-by: Konstantin Shcheglov <scheglov@google.com>
Commit-Queue: Brian Wilkerson <brianwilkerson@google.com>

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

@@ -3689,9 +3689,8 @@ abstract class BodyBuilder extends ScopeListener<JumpTarget>
       target = scope.lookupLabel(name);
     }
     if (target == null && name == null) {
-      push(compileTimeErrorInLoopOrSwitch =
-          deprecated_buildCompileTimeErrorStatement(
-              "No target of break.", breakKeyword.charOffset));
+      push(compileTimeErrorInLoopOrSwitch = buildCompileTimeErrorStatement(
+          fasta.messageBreakOutsideOfLoop, breakKeyword.charOffset));
     } else if (target == null ||
         target is! JumpTarget ||
         !target.isBreakTarget) {

pkg/front_end/messages.status

@@ -21,7 +21,6 @@ AssertExtraneousArgument/example: Fail
 AsyncAsIdentifier/example: Fail
 AwaitAsIdentifier/example: Fail
 AwaitNotAsync/example: Fail
-BreakOutsideOfLoop/script1: Fail
 BuiltInIdentifierAsType/example: Fail
 BuiltInIdentifierInDeclaration/example: Fail
 CannotReadPackagesFile/analyzerCode: Fail