Make SDK contexts visible on status page

pkg/analysis_server/lib/src/status/get_handler.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 analysis_server.src.status.get_handler;
 
 import 'dart:collection';
 import 'dart:convert';
 import 'dart:io';
 import 'dart:math';
@@ skipping 1699 matching lines @@
         buffer.write(makeLink(CONTEXT_PATH, {CONTEXT_QUERY_PARAM: folder.path},
             key, _hasException(folderMap[folder])));
         buffer.write(' <small><b>[');
         buffer.write(makeLink(CONTEXT_DIAGNOSTICS_PATH,
             {CONTEXT_QUERY_PARAM: folder.path}, 'diagnostics'));
         buffer.write(']</b></small>');
         if (!folder.getChild('.packages').exists) {
           buffer.write(' <small>[no .packages file]</small>');
         }
       });
-      // TODO(brianwilkerson) Add items for the SDK contexts (currently only one).
+      buffer.write('</p>');
+      buffer.write('<p><b>SDK Contexts</b></p>');
+      buffer.write('<p>');
+      first = true;
+      List<String> descriptors = analysisServer.sdkManager.sdkDescriptors
+          .map((SdkDescription descriptor) => descriptor.toString())
+          .toList();
+      if (descriptors.isEmpty) {
+        buffer.write('none');
+      } else {
+        descriptors.sort();
+        for (String descriptor in descriptors) {
+          if (first) {
+            first = false;
+          } else {
+            buffer.write('<br>');
+          }
+          // TODO(brianwilkerson) Add a link to information about the contexts.
+          buffer.write(descriptor);
+        }
+      }
       buffer.write('</p>');
 
       int freq = AnalysisServer.performOperationDelayFrequency;
       String delay = freq > 0 ? '1 ms every $freq ms' : 'off';
 
       buffer.write('<p><b>Performance Data</b></p>');
       buffer.write('<p>Perform operation delay: $delay</p>');
       buffer.write('<p>');
       buffer.write(makeLink(ANALYSIS_PERFORMANCE_PATH, {}, 'Task data'));
       buffer.write('</p>');
@@ skipping 803 matching lines @@
    */
   static String makeLink(
       String path, Map<String, String> params, String innerHtml,
       [bool hasError = false]) {
     Uri uri = new Uri(path: path, queryParameters: params);
     String href = HTML_ESCAPE.convert(uri.toString());
     String classAttribute = hasError ? ' class="error"' : '';
     return '<a href="$href"$classAttribute>$innerHtml</a>';
   }
 }