Change getRange to sublist. Make getRange deprecated.

tools/testing/dart/http_server.dart

Index: tools/testing/dart/http_server.dart
diff --git a/tools/testing/dart/http_server.dart b/tools/testing/dart/http_server.dart
index d065e0bcaac33f64a9dda61127ccee40c4d58c7f..b555c4ac1b8635a1a8188ae897ac9ea2887e2490 100644
--- a/tools/testing/dart/http_server.dart
+++ b/tools/testing/dart/http_server.dart
@@ -189,20 +189,18 @@ class TestingServers {
       if (pathSegments[0] == PREFIX_BUILDDIR) {
         basePath = _buildDirectory;
         relativePath = new Path(
-            pathSegments.getRange(1, pathSegments.length - 1).join('/'));
+            pathSegments.skip(1).join('/'));
       } else if (pathSegments[0] == PREFIX_DARTDIR) {
         basePath = TestUtils.dartDir();
         relativePath = new Path(
-            pathSegments.getRange(1, pathSegments.length - 1).join('/'));
+            pathSegments.skip(1).join('/'));
       }
       var packagesDirName = 'packages';
       var packagesIndex = pathSegments.indexOf(packagesDirName);
       if (packagesIndex != -1) {
         var start = packagesIndex + 1;
-        var length = pathSegments.length - start;
         basePath = _buildDirectory.append(packagesDirName);
-        relativePath = new Path(
-            pathSegments.getRange(start, length).join('/'));
+        relativePath = new Path(pathSegments.skip(start).join('/'));
       }
       if (basePath != null && relativePath != null) {
         return basePath.join(relativePath);