dart2js: Initial implementation of inlining.

tests/compiler/dart2js/js_backend_cps_ir_interceptors_test.dart

 // Copyright (c) 2014, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 // Tests of interceptors.
 
 library interceptors_tests;
 
 import 'js_backend_cps_ir.dart';
 
 const List<TestEntry> tests = const [
   const TestEntry("""
 main() {
   var g = 1;
 
   var x = g + 3;
   print(x);
 }""",
 r"""
 function() {
-  P.print(4);
+  var v0 = H.S(4);
+  if (typeof dartPrint == "function")
+    dartPrint(v0);
+  else if (typeof console == "object" && typeof console.log != "undefined")
+    console.log(v0);
+  else if (!(typeof window == "object")) {
+    if (!(typeof print == "function"))
+      throw "Unable to print message: " + String(v0);
+    print(v0);
+  }
 }"""),
   const TestEntry("""
 main() {
   var l = ['hest', ['h', 'e', 's', 't']];
   print(l.length);
   for (int i  = 0; i < l.length; i++) {
     var x = l[i];
     for (int j = 0; j < x.length; j++) {
       print(x[j]);
     }
   }
 }""",
 r"""
 function() {
   var l = ["hest", ["h", "e", "s", "t"]], i = 0, x, j;
   for (P.print(2); i < 2; i = i + 1) {
     x = l[i];
     for (j = 0; j < x.length; j = j + 1)
       P.print(x[j]);
   }
 }"""),
 ];
 
 
 void main() {
   runTests(tests);
 }