Perform type inference on constructor field initializer expressions.

pkg/front_end/testcases/inference/field_initializer_context_explicit.dart

Index: pkg/front_end/testcases/inference/field_initializer_context_explicit.dart
diff --git a/pkg/front_end/testcases/inference/field_initializer_context_explicit.dart b/pkg/front_end/testcases/inference/field_initializer_context_explicit.dart
new file mode 100644
index 0000000000000000000000000000000000000000..8306cc02300e58e3e02c092e29eeaead92ded66f
--- /dev/null
+++ b/pkg/front_end/testcases/inference/field_initializer_context_explicit.dart
@@ -0,0 +1,15 @@
+// Copyright (c) 2017, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
+/*@testedFeatures=inference*/
+library test;
+
+T f<T>() => null;
+
+class C {
+  final int x;
+  C() : x = /*@typeArgs=int*/ f();
+}
+
+main() {}