Convert generic method errors to hints

pkg/analyzer/lib/src/generated/error_verifier.dart

Index: pkg/analyzer/lib/src/generated/error_verifier.dart
diff --git a/pkg/analyzer/lib/src/generated/error_verifier.dart b/pkg/analyzer/lib/src/generated/error_verifier.dart
index a74fd36539879a6531e0a86c87bd67811b0d1f65..27bb23d0d95d332239457e2bb38b2b70219fcced 100644
--- a/pkg/analyzer/lib/src/generated/error_verifier.dart
+++ b/pkg/analyzer/lib/src/generated/error_verifier.dart
@@ -1754,7 +1754,7 @@ class ErrorVerifier extends RecursiveAstVisitor<Object> {
         int count = params1.length;
         if (params2.length != count) {
           _errorReporter.reportErrorForNode(
-              StaticWarningCode.INVALID_METHOD_OVERRIDE_TYPE_PARAMETERS,
+              HintCode.INVALID_METHOD_OVERRIDE_TYPE_PARAMETERS,

[Jennifer Messerly, 2016/11/08 01:21:57]

I think this one is okay though, because we don't go down this code path in
strong mode.

               errorNameTarget, [
             count,
             params2.length,
@@ -1788,7 +1788,7 @@ class ErrorVerifier extends RecursiveAstVisitor<Object> {
           pFresh.bound = bound2;
           if (!_typeSystem.isSubtypeOf(bound2, bound1)) {
             _errorReporter.reportErrorForNode(
-                StaticWarningCode.INVALID_METHOD_OVERRIDE_TYPE_PARAMETER_BOUND,
+                HintCode.INVALID_METHOD_OVERRIDE_TYPE_PARAMETER_BOUND,
                 errorNameTarget, [
               p1.displayName,
               p1.bound,