Remove TODOs from KernelConditionalExpression._inferExpression.

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

Index: pkg/front_end/testcases/inference/conditional_upwards_inference.dart.direct.expect
diff --git a/pkg/front_end/testcases/inference/conditional_upwards_inference.dart.direct.expect b/pkg/front_end/testcases/inference/conditional_upwards_inference.dart.direct.expect
new file mode 100644
index 0000000000000000000000000000000000000000..8145e1106bd470b3eee3c1b665fd8537cf67ce07
--- /dev/null
+++ b/pkg/front_end/testcases/inference/conditional_upwards_inference.dart.direct.expect
@@ -0,0 +1,17 @@
+library test;
+import self as self;
+import "dart:core" as core;
+
+class C<T extends core::Object> extends core::Object {
+  constructor •(core::List<self::C::T> x) → void
+    : super core::Object::•()
+    ;
+}
+static method main() → dynamic {
+  core::bool b = false;
+  core::List<core::int> l1 = <dynamic>[1];
+  core::List<core::int> l2 = <dynamic>[2];
+  dynamic x = new self::C::•<dynamic>(l1);
+  dynamic y = new self::C::•<dynamic>(l2);
+  dynamic z = new self::C::•<dynamic>(b ? l1 : l2);
+}