Replace using reprecated 'package:analyzer/src/generated/error.dart'.

pkg/analyzer_cli/lib/src/error_formatter.dart

 // Copyright (c) 2015, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 library analyzer_cli.src.error_formatter;
 
+import 'package:analyzer/error/error.dart';
 import 'package:analyzer/src/generated/engine.dart';
-import 'package:analyzer/src/generated/error.dart';
 import 'package:analyzer/src/generated/source.dart';
 import 'package:analyzer_cli/src/options.dart';
 
 /// Returns the given error's severity.
 ProcessedSeverity _identity(AnalysisError error) =>
     new ProcessedSeverity(error.errorCode.errorSeverity);
 
 String _pluralize(String word, int count) => count == 1 ? word : word + "s";
 
 /// Returns desired severity for the given [error] (or `null` if it's to be
@@ skipping 145 matching lines @@
         }
       }
 
       // [warning] 'foo' is not a... (/Users/.../tmp/foo.dart, line 1, col 2)
       out.write('[$errorType] ${error.message} ');
       out.write('(${source.fullName}');
       out.write(', line ${location.lineNumber}, col ${location.columnNumber})');
     }
     out.writeln();
   }
+
   void formatErrors(List<AnalysisErrorInfo> errorInfos) {
     stats.unfilteredCount += errorInfos.length;
 
     var errors = new List<AnalysisError>();
     var errorToLine = new Map<AnalysisError, LineInfo>();
     for (AnalysisErrorInfo errorInfo in errorInfos) {
       for (AnalysisError error in errorInfo.errors) {
         if (computeSeverity(error) != null) {
           errors.add(error);
           errorToLine[error] = errorInfo.lineInfo;
@@ skipping 52 matching lines @@
     return result.toString();
   }
 }
 
 /// A severity with awareness of whether it was overridden by a processor.
 class ProcessedSeverity {
   ErrorSeverity severity;
   bool overridden;
   ProcessedSeverity(this.severity, [this.overridden = false]);
 }