pkg/analyzer: support latest pkg/crypto version

tests/standalone/io/web_socket_compression_test.dart

Index: tests/standalone/io/web_socket_compression_test.dart
diff --git a/tests/standalone/io/web_socket_compression_test.dart b/tests/standalone/io/web_socket_compression_test.dart
index e25bc1b2d4f6a28fc926e14a7d163a4793eea154..99f341eeaf6939a821a11ebb5b36528938a45864 100644
--- a/tests/standalone/io/web_socket_compression_test.dart
+++ b/tests/standalone/io/web_socket_compression_test.dart
@@ -57,7 +57,7 @@ class SecurityConfiguration {
     for (int i = 0; i < 16; i++) {
       nonceData[i] = random.nextInt(256);
     }
-    String nonce = CryptoUtils.bytesToBase64(nonceData);
+    String nonce = BASE64.encode(nonceData);
 
     uri = new Uri(
         scheme: uri.scheme == "wss" ? "https" : "http",
@@ -71,7 +71,7 @@ class SecurityConfiguration {
       if (uri.userInfo != null && !uri.userInfo.isEmpty) {
         // If the URL contains user information use that for basic
         // authorization.
-        String auth = CryptoUtils.bytesToBase64(UTF8.encode(uri.userInfo));
+        String auth = BASE64.encode(UTF8.encode(uri.userInfo));
         request.headers.set(HttpHeaders.AUTHORIZATION, "Basic $auth");
       }
       // Setup the initial handshake.
@@ -175,8 +175,8 @@ class SecurityConfiguration {
         Expect.equals('websocket', request.headers.value(HttpHeaders.UPGRADE));
 
         var key = request.headers.value('Sec-WebSocket-Key');
-        var sha1 = new SHA1()..add("$key$WEB_SOCKET_GUID".codeUnits);
-        var accept = CryptoUtils.bytesToBase64(sha1.close());
+        var digest = sha1.convert("$key$WEB_SOCKET_GUID".codeUnits);
+        var accept = BASE64.encode(digest.bytes);
         request.response
             ..statusCode = HttpStatus.SWITCHING_PROTOCOLS
             ..headers.add(HttpHeaders.CONNECTION, "Upgrade")