Update deprecated references.

Change-Id: I99b827502fef1c4dc2d8ccdece74df59765dcb54
Reviewed-on: https://dart-review.googlesource.com/61300
Reviewed-by: Konstantin Shcheglov <scheglov@google.com>
Commit-Queue: Devon Carew <devoncarew@google.com>
diff --git a/pkg/analysis_server/lib/src/server/http_server.dart b/pkg/analysis_server/lib/src/server/http_server.dart
index 6acfe4e..c5cff7d 100644
--- a/pkg/analysis_server/lib/src/server/http_server.dart
+++ b/pkg/analysis_server/lib/src/server/http_server.dart
@@ -29,8 +29,8 @@
   @override
   void handleGetRequest(HttpRequest request) {
     HttpResponse response = request.response;
-    response.statusCode = HttpStatus.NOT_FOUND;
-    response.headers.contentType = ContentType.TEXT;
+    response.statusCode = HttpStatus.notFound;
+    response.headers.contentType = ContentType.text;
     response.write(message);
     response.close();
   }
@@ -146,7 +146,7 @@
     httpServer.listen((HttpRequest request) async {
       // TODO(brianwilkerson) Determine whether this await is necessary.
       await null;
-      List<String> updateValues = request.headers[HttpHeaders.UPGRADE];
+      List<String> updateValues = request.headers[HttpHeaders.upgradeHeader];
       if (request.method == 'GET') {
         await _handleGetRequest(request);
       } else if (updateValues != null &&
@@ -154,8 +154,8 @@
         // We no longer support serving analysis server communications over
         // WebSocket connections.
         HttpResponse response = request.response;
-        response.statusCode = HttpStatus.NOT_FOUND;
-        response.headers.contentType = ContentType.TEXT;
+        response.statusCode = HttpStatus.notFound;
+        response.headers.contentType = ContentType.text;
         response.write(
             'WebSocket connections not supported (${request.uri.path}).');
         response.close();
@@ -171,8 +171,8 @@
    */
   void _returnUnknownRequest(HttpRequest request) {
     HttpResponse response = request.response;
-    response.statusCode = HttpStatus.NOT_FOUND;
-    response.headers.contentType = ContentType.TEXT;
+    response.statusCode = HttpStatus.notFound;
+    response.headers.contentType = ContentType.text;
     response.write('Not found');
     response.close();
   }
diff --git a/pkg/analysis_server/lib/src/status/pages.dart b/pkg/analysis_server/lib/src/status/pages.dart
index d13e0de..f9c7e06 100644
--- a/pkg/analysis_server/lib/src/status/pages.dart
+++ b/pkg/analysis_server/lib/src/status/pages.dart
@@ -156,22 +156,22 @@
       for (Page page in pages) {
         if (page.path == path) {
           HttpResponse response = request.response;
-          response.headers.contentType = ContentType.HTML;
+          response.headers.contentType = ContentType.html;
           response.write(await page.generate(request.uri.queryParameters));
           response.close();
           return;
         }
       }
 
-      await respond(request, createUnknownPage(path), HttpStatus.NOT_FOUND);
+      await respond(request, createUnknownPage(path), HttpStatus.notFound);
     } catch (e, st) {
       try {
         await respond(request, createExceptionPage('$e', st),
-            HttpStatus.INTERNAL_SERVER_ERROR);
+            HttpStatus.internalServerError);
       } catch (e, st) {
         HttpResponse response = request.response;
-        response.statusCode = HttpStatus.INTERNAL_SERVER_ERROR;
-        response.headers.contentType = ContentType.TEXT;
+        response.statusCode = HttpStatus.internalServerError;
+        response.headers.contentType = ContentType.text;
         response.write('$e\n\n$st');
         response.close();
       }
@@ -179,19 +179,19 @@
   }
 
   Future<Null> respond(HttpRequest request, Page page,
-      [int code = HttpStatus.OK]) async {
+      [int code = HttpStatus.ok]) async {
     // TODO(brianwilkerson) Determine whether this await is necessary.
     await null;
     HttpResponse response = request.response;
     response.statusCode = code;
-    response.headers.contentType = ContentType.HTML;
+    response.headers.contentType = ContentType.html;
     response.write(await page.generate(request.uri.queryParameters));
     response.close();
   }
 
   void respondRedirect(HttpRequest request, String pathFragment) {
     HttpResponse response = request.response;
-    response.statusCode = HttpStatus.MOVED_TEMPORARILY;
+    response.statusCode = HttpStatus.movedTemporarily;
     response.redirect(request.uri.resolve(pathFragment));
   }
 }
diff --git a/pkg/analysis_server/tool/instrumentation/server.dart b/pkg/analysis_server/tool/instrumentation/server.dart
index 64f77bb..558cac1 100644
--- a/pkg/analysis_server/tool/instrumentation/server.dart
+++ b/pkg/analysis_server/tool/instrumentation/server.dart
@@ -102,7 +102,9 @@
    */
   void serveHttp(int port) {
     _server = HttpServer.bind(InternetAddress.loopbackIPv4, port);
-    _server.then(_handleServer).catchError((_) {/* Ignore errors. */});
+    _server.then(_handleServer).catchError((_) {
+      /* Ignore errors. */
+    });
   }
 
   /**
@@ -127,7 +129,7 @@
       return;
     } catch (exception, stackTrace) {
       HttpResponse response = request.response;
-      response.statusCode = HttpStatus.OK;
+      response.statusCode = HttpStatus.ok;
       response.headers.contentType = _htmlContent;
       StringBuffer buffer = new StringBuffer();
       buffer.write('<p><b>Exception while composing page:</b></p>');
@@ -141,7 +143,7 @@
     }
 
     HttpResponse response = request.response;
-    response.statusCode = HttpStatus.OK;
+    response.statusCode = HttpStatus.ok;
     response.headers.contentType = _htmlContent;
     response.write(buffer.toString());
     response.close();
@@ -176,11 +178,11 @@
    */
   void _returnUnknownRequest(HttpRequest request) {
     HttpResponse response = request.response;
-    response.statusCode = HttpStatus.NOT_FOUND;
+    response.statusCode = HttpStatus.notFound;
     response.headers.contentType =
         new ContentType("text", "html", charset: "utf-8");
-    response.write(
-        '<html><head></head><body><h3>Page not found: "${request.uri.path}".</h3></body></html>');
+    response.write('<html><head></head><body><h3>Page not found: "${request.uri
+            .path}".</h3></body></html>');
     response.close();
   }