Clarify type names in analysis server API.

pkg/analysis_server/lib/src/protocol.dart

 // Copyright (c) 2014, 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 protocol;
 
 import 'dart:collection';
 import 'dart:convert';
 
 import 'package:analysis_server/src/computer/element.dart' show
@@ skipping 80 matching lines @@
     if (lineInfo != null) {
       engine.LineInfo_Location lineLocation = lineInfo.getLocation(offset);
       if (lineLocation != null) {
         startLine = lineLocation.lineNumber;
         startColumn = lineLocation.columnNumber;
       }
     }
     location = new Location(file, offset, length, startLine, startColumn);
   }
   // done
-  var severity = new ErrorSeverity(errorCode.errorSeverity.name);
-  var type = new ErrorType(errorCode.type.name);
+  var severity = new AnalysisErrorSeverity(errorCode.errorSeverity.name);
+  var type = new AnalysisErrorType(errorCode.type.name);
   String message = error.message;
   String correction = error.correction;
   return new AnalysisError(
       severity,
       type,
       location,
       message,
       correction: correction);
 }
 
@@ skipping 831 matching lines @@
     hash = 0x1fffffff & (hash + ((0x03ffffff & hash) << 3));
     hash = hash ^ (hash >> 11);
     return 0x1fffffff & (hash + ((0x00003fff & hash) << 15));
   }
 
   static int hash2(a, b) => finish(combine(combine(0, a), b));
 
   static int hash4(a, b, c, d) =>
       finish(combine(combine(combine(combine(0, a), b), c), d));
 }