Make futures returned by AnalysisContext cancelable.

pkg/analyzer/test/test_all.dart

Index: pkg/analyzer/test/test_all.dart
diff --git a/pkg/analyzer/test/test_all.dart b/pkg/analyzer/test/test_all.dart
index 5aa9922ed6bd6a7b197d6e6e3e3fe1026e1941ab..b8f60d4cbd55469b99da57b924e6ff68e2620003 100644
--- a/pkg/analyzer/test/test_all.dart
+++ b/pkg/analyzer/test/test_all.dart
@@ -14,12 +14,14 @@ import 'options_test.dart' as options;
 import 'parse_compilation_unit_test.dart' as parse_compilation_unit;
 import 'source/test_all.dart' as source;
 import 'task/test_all.dart' as task;
+import 'cancelable_future_test.dart' as cancelable_future_test;
 
 
 /// Utility for manually running all tests.
 main() {
   groupSep = ' | ';
   group('analysis engine', () {
+    cancelable_future_test.main();

[scheglov, 2014/12/15 21:31:19]

This will make this test suite 2 seconds slower :-(

[Paul Berry, 2014/12/16 16:58:06]

I am open to suggestions for improving the test suite.

     enum_test.main();
     error.main();
     file_system.main();