No errors in third-party packages (issue 22170)

pkg/analyzer/lib/src/analyzer_impl.dart

Index: pkg/analyzer/lib/src/analyzer_impl.dart
diff --git a/pkg/analyzer/lib/src/analyzer_impl.dart b/pkg/analyzer/lib/src/analyzer_impl.dart
index 222aad7f1a1378830e54f1b91ee62255a1a1f437..849356fd0335af373f9d7a6c35e8a91e7b3778c8 100644
--- a/pkg/analyzer/lib/src/analyzer_impl.dart
+++ b/pkg/analyzer/lib/src/analyzer_impl.dart
@@ -150,7 +150,7 @@ class AnalyzerImpl {
       new DartUriResolver(sdk),
       new FileUriResolver()
     ];
-    // may be add package resolver
+    // maybe add package resolver
     {
       JavaFile packageDirectory;
       if (options.packageRootPath != null) {
@@ -187,6 +187,8 @@ class AnalyzerImpl {
     contextOptions.hint = !options.disableHints;
     contextOptions.analyzeFunctionBodiesPredicate =
         _analyzeFunctionBodiesPredicate;
+    contextOptions.generateImplicitErrors = options.showPackageWarnings;
+    contextOptions.generateSdkErrors = options.showSdkWarnings;
     context.analysisOptions = contextOptions;
 
     // Create and add a ChangeSet