cpsir unittests: move all unittests into individual files and test runners.

tests/compiler/dart2js/cps_ir/expected/basic_3.js

Index: tests/compiler/dart2js/cps_ir/expected/basic_3.js
diff --git a/tests/compiler/dart2js/cps_ir/expected/basic_3.js b/tests/compiler/dart2js/cps_ir/expected/basic_3.js
new file mode 100644
index 0000000000000000000000000000000000000000..3d8269ff337bb499e2d43294a4ee4487a2db63c8
--- /dev/null
+++ b/tests/compiler/dart2js/cps_ir/expected/basic_3.js
@@ -0,0 +1,25 @@
+// Expectation for test: 
+// foo(a) {
+//   print(a);
+//   return a;
+// }
+// main() {
+//   var a = 10;
+//   var b = 1;
+//   var t;
+//   t = a;
+//   a = b;
+//   b = t;
+//   print(a);
+//   print(b);
+//   print(b);
+//   print(foo(a));
+// }
+
+function() {
+  P.print(1);
+  P.print(10);
+  P.print(10);
+  P.print(1);
+  P.print(1);
+}