Ignore harmless paths in the http_server.dart

tools/testing/dart/http_server.dart

 // Copyright (c) 2013, 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 http_server;
 
 import 'dart:async';
 import 'dart:io';
 import 'dart:isolate';
 import 'dart:uri';
@@ skipping 71 matching lines @@
       DebugLogger.info('Server listening on port ${servers.crossOriginPort}');
     });
   }
 }
 
 /**
  * Runs a set of servers that are initialized specifically for the needs of our
  * test framework, such as dealing with package-root.
  */
 class TestingServers {
+  static final _HARMLESS_REQUEST_PATH_ENDINGS = [
+    "/apple-touch-icon.png",
+    "/apple-touch-icon-precomposed.png",
+    "/favicon.ico",
+    "/foo",
+    "/bar",
+    "/NonExistingFile",
+    "/hahaURL",
+  ];
+
   List _serverList = [];
   Path _buildDirectory = null;
   final bool useContentSecurityPolicy;
   final String runtime;
 
   TestingServers(Path buildDirectory,
                  this.useContentSecurityPolicy,
                  [String this.runtime = 'none']) {
     _buildDirectory = TestUtils.absolutePath(buildDirectory);
   }
@@ skipping 240 matching lines @@
     } else if (path.filename.endsWith('.dart')) {
       response.headers.set('Content-Type', 'application/dart');
     }
     file.openRead().pipe(response).catchError((e) {
       DebugLogger.warning(
           'HttpServer: error while closing the response stream', e);
     });
   }
 
   void _sendNotFound(HttpRequest request, HttpResponse response) {
-    // NOTE: Since some tests deliberately try to access non-existent files.
-    // We might want to remove this warning (otherwise it will show
-    // up in the debug.log every time).
-    if (request.uri.path != "/favicon.ico") {
+    bool isHarmlessPath(String path) {
+      return _HARMLESS_REQUEST_PATH_ENDINGS.any((ending) {
+        return path.endsWith(ending);
+      });
+    }
+    if (!isHarmlessPath(request.uri.path)) {
       DebugLogger.warning('HttpServer: could not find file for request path: '
                           '"${request.uri.path}"');
     }
     response.statusCode = HttpStatus.NOT_FOUND;
     response.close();
     response.done.catchError((e) {
       DebugLogger.warning(
           'HttpServer: error while closing the response stream', e);
     });
   }
 }
 
 // Helper class for displaying directory listings.
 class _Entry {
   final String name;
   final String displayName;
 
   _Entry(this.name, this.displayName);
 
   int compareTo(_Entry other) {
     return name.compareTo(other.name);
   }
 }