Move kernel baseline tests to front_end.

pkg/kernel/testcases/strong-mode/micro.baseline.txt

-library;
-import self as self;
-import "dart:core" as core;
-
-class Foo extends core::Object {
-  constructor •() → void
-    : super core::Object::•()
-    ;
-  method instanceMethod() → dynamic {
-    return 123;
-  }
-}
-abstract class ExternalValue extends core::Object {
-}
-abstract class Bar extends core::Object {
-  abstract method externalInstanceMethod() → self::ExternalValue;
-}
-class Box extends core::Object {
-  field dynamic field = null;
-  constructor •() → void
-    : super core::Object::•()
-    ;
-}
-class FinalBox extends core::Object {
-  final field dynamic finalField;
-  constructor •(dynamic finalField) → void
-    : self::FinalBox::finalField = finalField, super core::Object::•()
-    ;
-}
-class SubFinalBox extends self::FinalBox {
-  constructor •(dynamic value) → void
-    : super self::FinalBox::•(value)
-    ;
-}
-class DynamicReceiver1 extends core::Object {
-  constructor •() → void
-    : super core::Object::•()
-    ;
-  method dynamicallyCalled(dynamic x) → dynamic {}
-}
-class DynamicReceiver2 extends core::Object {
-  constructor •() → void
-    : super core::Object::•()
-    ;
-  method dynamicallyCalled(dynamic x) → dynamic {}
-}
-static method staticMethod() → dynamic {
-  return "sdfg";
-}
-external static method externalStatic() → core::bool;
-external static method createBar() → self::Bar;
-static method stringArgument(dynamic x) → dynamic {}
-static method intArgument(dynamic x) → dynamic {}
-static method makeDynamicCall(dynamic receiver) → void {
-  receiver.dynamicallyCalled("sdfg");
-}
-static method main() → dynamic {
-  dynamic x = self::staticMethod();
-  dynamic y = new self::Foo::•().{self::Foo::instanceMethod}();
-  core::bool z = self::externalStatic();
-  self::ExternalValue w = self::createBar().{self::Bar::externalInstanceMethod}();
-  self::stringArgument("sdfg");
-  self::intArgument(42);
-  self::Box box = new self::Box::•();
-  box.{self::Box::field} = "sdfg";
-  dynamic a = box.{self::Box::field};
-  self::FinalBox finalBox = new self::FinalBox::•("dfg");
-  dynamic b = finalBox.{self::FinalBox::finalField};
-  self::SubFinalBox subBox = new self::SubFinalBox::•("dfg");
-  dynamic c = subBox.{self::FinalBox::finalField};
-  self::makeDynamicCall(new self::DynamicReceiver1::•());
-  self::makeDynamicCall(new self::DynamicReceiver2::•());
-  core::List<core::String> list = <core::String>["string"];
-  core::String d = list.{core::List::[]}(0);
-}