Fix an issue with duplicate reported analysis errors.

pkg/analyzer_cli/lib/src/error_severity.dart

Index: pkg/analyzer_cli/lib/src/error_severity.dart
diff --git a/pkg/analyzer_cli/lib/src/error_severity.dart b/pkg/analyzer_cli/lib/src/error_severity.dart
index 29566237c246b04b15c674734cc63b8f5cdbdc07..17b7fe5f8867b2fe03de84f34d02eff92c06e333 100644
--- a/pkg/analyzer_cli/lib/src/error_severity.dart
+++ b/pkg/analyzer_cli/lib/src/error_severity.dart
@@ -11,7 +11,7 @@ import 'package:analyzer_cli/src/options.dart';
 
 /// Check various configuration options to get a desired severity for this
 /// [error] (or `null` if it's to be suppressed).
-ProcessedSeverity processError(AnalysisError error,
+ProcessedSeverity determineProcessedSeverity(AnalysisError error,
     CommandLineOptions commandLineOptions, AnalysisOptions analysisOptions) {
   ErrorSeverity severity = computeSeverity(error, commandLineOptions,
       analysisOptions: analysisOptions);