Share test-source between full emitter and fast startup emitter dill tests.

tests/compiler/dart2js/kernel/compile_from_dill_test_helper.dart

Index: tests/compiler/dart2js/kernel/compile_from_dill_test_helper.dart
diff --git a/tests/compiler/dart2js/kernel/compile_from_dill_test_helper.dart b/tests/compiler/dart2js/kernel/compile_from_dill_test_helper.dart
index 8f781d4784591942b8b8c9f8279f088a0b8cefc2..b934b660ac82c23954b78346549ffc3cc05e2286 100644
--- a/tests/compiler/dart2js/kernel/compile_from_dill_test_helper.dart
+++ b/tests/compiler/dart2js/kernel/compile_from_dill_test_helper.dart
@@ -29,6 +29,63 @@ import 'test_helpers.dart';
 
 import 'compiler_helper.dart';
 
+const SOURCE = const {
+  'main.dart': '''
+foo({named}) => 1;
+bar(a) => !a;
+class Class {
+  var field;
+  static var staticField;
+
+  Class();
+  Class.named(this.field);
+
+  method() {}
+}
+
+class SubClass extends Class {
+  method() {
+    super.method();
+  }  
+}
+main() {
+  foo();
+  bar(true);
+  [];
+  {};
+  new Object();
+  new Class.named('');
+  new SubClass().method();
+  Class.staticField;
+  var x = null;
+  var y1 = x == null;
+  var y2 = null == x;
+  var z1 = x?.toString();
+  var z2 = x ?? y1;
+  var z3 = x ??= y2;
+  var w = x == null ? null : x.toString();
+  for (int i = 0; i < 10; i++) {
+    if (i == 5) continue;
+    x = i;
+    if (i == 5) break;
+  }
+  int i = 0;
+  while (i < 10) {
+    if (i == 5) continue;
+    x = i;
+    if (i == 5) break;
+  }
+  for (var v in [3, 5]) {
+    if (v == 5) continue;
+    x = v;
+    if (v == 5) break;
+  }
+  print(x);
+  return x;
+}
+'''
+};
+
 enum ResultKind { crashes, errors, warnings, success, failure }
 
 Future<ResultKind> runTest(