Remove CompilerCancelledException.

dart/tests/compiler/dart2js/mock_compiler.dart

Index: dart/tests/compiler/dart2js/mock_compiler.dart
diff --git a/dart/tests/compiler/dart2js/mock_compiler.dart b/dart/tests/compiler/dart2js/mock_compiler.dart
index 136ac760fdc9dce4b013ec51734fd5299d1e4537..0c6fa8eb456a4392ddcf7d6569be573ed21b6b86 100644
--- a/dart/tests/compiler/dart2js/mock_compiler.dart
+++ b/dart/tests/compiler/dart2js/mock_compiler.dart
@@ -212,14 +212,7 @@ class MockCompiler extends Compiler {
     if (visitor.scope is LibraryScope) {
       visitor.scope = new MethodScope(visitor.scope, element);
     }
-    try {
-      visitor.visit(tree);
-    } on CompilerCancelledException catch (_) {
-      // Ignored.
-
-      // TODO(ahe): Don't ignore CompilerCancelledException, instead, fix
-      // pkg/compiler/lib/src/resolution/members.dart.
-    }
+    visitor.visit(tree);
     visitor.scope = new LibraryScope(element.library);
     return visitor.registry.mapping;
   }