Converted Observatory cpu-profile-table element

runtime/observatory/lib/src/elements/cpu_profile.dart

Index: runtime/observatory/lib/src/elements/cpu_profile.dart
diff --git a/runtime/observatory/lib/src/elements/cpu_profile.dart b/runtime/observatory/lib/src/elements/cpu_profile.dart
index 014fd807fe2dd4345a0d379dc5fd538eb5cc04d9..75e2c0747ef5915ff638fbc1d34e313c18da80bd 100644
--- a/runtime/observatory/lib/src/elements/cpu_profile.dart
+++ b/runtime/observatory/lib/src/elements/cpu_profile.dart
@@ -131,9 +131,9 @@ class CpuProfileElement  extends HtmlElement implements Renderable {
             })
             ..onFilterChange.listen((e) {
               _filter = e.element.filter.trim();
-              tree.filter = _filter.isNotEmpty
-                ? (node) { return node.name.contains(_filter); }
-                : null;
+              tree.filters = _filter.isNotEmpty
+                ? [(node) { return node.name.contains(_filter); }]
+                : const [];
             })
             ..onDirectionChange.listen((e) {
               _direction = tree.direction = e.element.direction;