Only set types of conditional expressions in strong mode.

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

 library test;
 import self as self;
 import "dart:core" as core;
 
 class A extends core::Object {
   constructor •() → void
     : super core::Object::•()
     ;
 }
 class B extends self::A {
@@ skipping 19 matching lines @@
   constructor •() → void
     : super core::Object::•()
     ;
 }
 class Test extends self::Base {
   constructor •() → void
     : super self::Base::•()
     ;
   method test() → void {
     super.{self::Base::member} = self::f<self::B>();
-    super.{self::Base::member}.{core::Object::==}(null) ?{dynamic} super.{self::Base::member} = self::f<self::B>() : null;
+    super.{self::Base::member}.{core::Object::==}(null) ? super.{self::Base::member} = self::f<self::B>() : null;
     super.{self::Base::member} = super.{self::Base::member}.{self::B::+}(self::f<dynamic>());
     super.{self::Base::member} = super.{self::Base::member}.{self::B::*}(self::f<dynamic>());
     super.{self::Base::member} = super.{self::Base::member}.{self::B::&}(self::f<dynamic>());
     super.{self::Base::member} = super.{self::Base::member}.{self::B::-}(1);
     super.{self::Base::member} = super.{self::Base::member}.{self::B::-}(1);
     self::B v1 = super.{self::Base::member} = self::f<self::B>();
-    self::B v2 = let final dynamic #t1 = super.{self::Base::member} in #t1.{core::Object::==}(null) ?{dynamic} super.{self::Base::member} = self::f<self::B>() : #t1;
+    self::B v2 = let final dynamic #t1 = super.{self::Base::member} in #t1.{core::Object::==}(null) ? super.{self::Base::member} = self::f<self::B>() : #t1;
     self::A v3 = super.{self::Base::member} = super.{self::Base::member}.{self::B::+}(self::f<dynamic>());
     self::B v4 = super.{self::Base::member} = super.{self::Base::member}.{self::B::*}(self::f<dynamic>());
     self::C v5 = super.{self::Base::member} = super.{self::Base::member}.{self::B::&}(self::f<dynamic>());
     self::B v6 = super.{self::Base::member} = super.{self::Base::member}.{self::B::-}(1);
     self::B v7 = let final dynamic #t2 = super.{self::Base::member} in let final dynamic #t3 = super.{self::Base::member} = #t2.{self::B::-}(1) in #t2;
   }
 }
 static method f<T extends core::Object>() → self::f::T
   return null;
 static method main() → dynamic {}