Test type inference for field initializers using "this." syntax.

R=scheglov@google.com

Review-Url: https://codereview.chromium.org/2986403002 .

pkg/front_end/testcases/ast_builder.status

@@ -93,6 +93,7 @@ inference/downwards_inference_on_map_literals: Crash
 inference/downwards_inference_yield_yield_star: Fail
 inference/field_initializer_context_explicit: Crash
 inference/field_initializer_context_implicit: Crash
+inference/field_initializer_context_this: Crash
 inference/field_initializer_parameter: Crash
 inference/field_refers_to_static_getter: Crash
 inference/field_refers_to_top_level_getter: Crash

pkg/front_end/testcases/inference/field_initializer_context_this.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() : this.x = /*@typeArgs=int*/ f();
+}
+
+main() {}

pkg/front_end/testcases/inference/field_initializer_context_this.dart.direct.expect

@@ -0,0 +1,13 @@
+library test;
+import self as self;
+import "dart:core" as core;
+
+class C extends core::Object {
+  final field core::int x;
+  constructor •() → void
+    : self::C::x = self::f<dynamic>(), super core::Object::•()
+    ;
+}
+static method f<T extends core::Object>() → self::f::T
+  return null;
+static method main() → dynamic {}

pkg/front_end/testcases/inference/field_initializer_context_this.dart.outline.expect

@@ -0,0 +1,13 @@
+library test;
+import self as self;
+import "dart:core" as core;
+
+class C extends core::Object {
+  final field core::int x;
+  constructor •() → void
+    ;
+}
+static method f<T extends core::Object>() → self::f::T
+  ;
+static method main() → dynamic
+  ;

pkg/front_end/testcases/inference/field_initializer_context_this.dart.strong.expect

@@ -0,0 +1,13 @@
+library test;
+import self as self;
+import "dart:core" as core;
+
+class C extends core::Object {
+  final field core::int x;
+  constructor •() → void
+    : self::C::x = self::f<core::int>(), super core::Object::•()
+    ;
+}
+static method f<T extends core::Object>() → self::f::T
+  return null;
+static method main() → dynamic {}