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

tests/compiler/dart2js/cps_ir/expected/operators2_1.js

Index: tests/compiler/dart2js/cps_ir/expected/operators2_1.js
diff --git a/tests/compiler/dart2js/cps_ir/expected/operators2_1.js b/tests/compiler/dart2js/cps_ir/expected/operators2_1.js
new file mode 100644
index 0000000000000000000000000000000000000000..5e39b1efa3b322c4276276ec6c896a8ff942c4ca
--- /dev/null
+++ b/tests/compiler/dart2js/cps_ir/expected/operators2_1.js
@@ -0,0 +1,11 @@
+// Expectation for test: 
+// foo(a, b) => ((a & 0xff0000) >> 1) & b;
+// main() {
+//   print(foo(123, 234));
+//   print(foo(0, 2));
+// }
+
+function() {
+  P.print((123 & 16711680) >>> 1 & 234);
+  P.print((0 & 16711680) >>> 1 & 2);
+}