Rework "analysis.updateContent" analysis server request.

pkg/analysis_server/tool/spec/codegen_matchers.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.
 
 /**
  * Code generation for the file "matchers.dart".
  */
 library codegen.matchers;
 
 import 'dart:convert';
@@ skipping 152 matching lines @@
       return;
     }
     writeln('{');
     indent(() {
       bool commaNeeded = false;
       for (TypeObjectField field in fields) {
         if (commaNeeded) {
           writeln(',');
         }
         write('${JSON.encode(field.name)}: ');
-        visitTypeDecl(field.type);
+        if (field.value != null) {
+          write('equals(${JSON.encode(field.value)})');
+        } else {
+          visitTypeDecl(field.type);
+        }
         commaNeeded = true;
       }
       writeln();
     });
     write('}');
   }
 
   @override
   void visitTypeReference(TypeReference typeReference) {
     write(camelJoin(['is', typeReference.typeName]));
   }
 }
 
 /**
  * Translate spec_input.html into protocol_matchers.dart.
  */
 main() {
   CodegenMatchersVisitor visitor = new CodegenMatchersVisitor(readApi());
   String code = visitor.collectCode(visitor.visitApi);
   File outputFile = new File('../../test/integration/protocol_matchers.dart');
   outputFile.writeAsStringSync(code);
 }