Only set types of conditional expressions in strong mode.

pkg/front_end/testcases/rasta/issue_000046.dart.direct.expect

Index: pkg/front_end/testcases/rasta/issue_000046.dart.direct.expect
diff --git a/pkg/front_end/testcases/rasta/issue_000046.dart.direct.expect b/pkg/front_end/testcases/rasta/issue_000046.dart.direct.expect
index 00d5a39e27b0de98bb86ed30344efb234cc4af11..2910ee2ca9e748cef3776b385f926f6fe7c02bef 100644
--- a/pkg/front_end/testcases/rasta/issue_000046.dart.direct.expect
+++ b/pkg/front_end/testcases/rasta/issue_000046.dart.direct.expect
@@ -1,5 +1,9 @@
 library;
 import self as self;
+import "dart:core" as core;
 
-static method main() → dynamic
-  throw "pkg/front_end/testcases/rasta/issue_000046.dart:6:19: Error: Expected ';' before this.\n  C c = new Object)();\n                  ^";
+class C extends core::Object {
+  field invalid-type c;
+  constructor •() → self::C
+    : self::C::c = invalid-expression, super core::Object::•();
+}