Implement type inference of constructor invocations in Fasta.

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

Index: pkg/front_end/testcases/inference/infer_type_on_var_from_top_level.dart.strong.expect
diff --git a/pkg/front_end/testcases/inference/infer_type_on_var_from_top_level.dart.strong.expect b/pkg/front_end/testcases/inference/infer_type_on_var_from_top_level.dart.strong.expect
new file mode 100644
index 0000000000000000000000000000000000000000..f5cfb2f096cfbfdf2b367a1e3091e6cdb48cd209
--- /dev/null
+++ b/pkg/front_end/testcases/inference/infer_type_on_var_from_top_level.dart.strong.expect
@@ -0,0 +1,21 @@
+library test;
+import self as self;
+import "dart:core" as core;
+
+static field core::int x = 0;
+static field core::int y = 0;
+static final field core::int z = 42;
+static method test1() → dynamic {
+  core::int a = self::x;
+  a = "hi";
+  a = 3;
+  core::int b = self::y;
+  b = "hi";
+  b = 4;
+  core::int c = self::z;
+  c = "hi";
+  c = 4;
+}
+static method main() → dynamic {
+  self::test1();
+}