Support setting unique names for lint codes

Change-Id: I815a519ea0278a6ea33c6f8d83ddac4f3cfd2a58
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/153561
Reviewed-by: Phil Quitslund <pquitslund@google.com>
Commit-Queue: Brian Wilkerson <brianwilkerson@google.com>

pkg/analyzer/lib/src/dart/error/lint_codes.dart

@@ -35,6 +35,15 @@ class LintCode extends ErrorCode {
   bool operator ==(other) => uniqueName == other.uniqueName;
 }
 
+class LintCodeWithUniqueName extends LintCode {
+  @override
+  final String uniqueName;
+
+  const LintCodeWithUniqueName(String name, this.uniqueName, String message,
+      {String correction})
+      : super(name, message, correction: correction);
+}
+
 /// Defines security-related best practice recommendations.
 ///
 /// The primary difference from [LintCode]s is that these codes cannot be
@@ -46,3 +55,13 @@ class SecurityLintCode extends LintCode {
   @override
   bool get isIgnorable => false;
 }
+
+class SecurityLintCodeWithUniqueName extends SecurityLintCode {
+  @override
+  final String uniqueName;
+
+  const SecurityLintCodeWithUniqueName(
+      String name, this.uniqueName, String message,
+      {String correction})
+      : super(name, message, correction: correction);
+}