Print static types of conditional expressions.

pkg/front_end/testcases/void-methods.dart.strong.expect

Index: pkg/front_end/testcases/void-methods.dart.strong.expect
diff --git a/pkg/front_end/testcases/void-methods.dart.strong.expect b/pkg/front_end/testcases/void-methods.dart.strong.expect
index d9c712d0e5528d647d3ad274c3381f33ec087fd8..cd527638a7b3f243945d382dc80ac0b08dd14585 100644
--- a/pkg/front_end/testcases/void-methods.dart.strong.expect
+++ b/pkg/front_end/testcases/void-methods.dart.strong.expect
@@ -7,12 +7,12 @@ class Foo extends core::Object {
   constructor •() → void
     : super core::Object::•()
     ;
-  set first(dynamic x) → void
-    this.{self::Foo::list}.{core::List::[]=$cc}(0, x);
+  set first(dynamic x) → dynamic
+    return let final dynamic #t1 = this.{self::Foo::list} in let final dynamic #t2 = 0 in let final dynamic #t3 = x in let final dynamic #t4 = #t1.{core::List::[]=}(#t2, #t3) in #t3;
   operator []=(dynamic x, dynamic y) → dynamic
-    this.{self::Foo::list}.{core::List::[]=$cc}(x as core::int, y);
+    return let final dynamic #t5 = this.{self::Foo::list} in let final dynamic #t6 = x in let final dynamic #t7 = y in let final dynamic #t8 = #t5.{core::List::[]=}(#t6, #t7) in #t7;
   method clear() → void
-    this.{self::Foo::list}.{core::List::clear}();
+    return this.{self::Foo::list}.{core::List::clear}();
 }
 static method main() → dynamic {
   new self::Foo::•().{self::Foo::first} = 4;