Add frog and froglib options back in dartium uses them.

tools/testing/dart/test_suite.dart

 // Copyright (c) 2012, 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.
 
 /**
  * Classes and methods for enumerating and preparing tests.
  *
  * This library includes:
  *
  * - Creating tests by listing all the Dart files in certain directories,
@@ skipping 572 matching lines @@
 
   /** Helper to create a compilation command for a single input file. */
   Command _compileCommand(String inputFile, String outputFile,
       String compiler, String dir, var vmOptions) {
     String executable = TestUtils.compilerPath(configuration);
     List<String> args = TestUtils.standardOptions(configuration);
     switch (compiler) {
       case 'frog':
       case 'frogsh':
       case 'dart2js':
-        String libdir = '$dartDir/frog/lib';
+        String libdir = configuration['froglib'];
+        if (libdir == '') {
+          libdir = '$dartDir/frog/lib';
+        }
         args.addAll(['--libdir=$libdir',
                              '--compile-only',
                              '--out=$outputFile']);
         args.addAll(vmOptions);
         args.add(inputFile);
         break;
       default:
         Expect.fail('unimplemented compiler $compiler');
     }
     return new Command(executable, args);
@@ skipping 514 matching lines @@
     if (!(new File(name)).existsSync() && !configuration['list']) {
       throw "Executable '$name' does not exist";
     }
     return name;
   }
 
   static String compilerPath(Map configuration) {
     if (configuration['compiler'] == 'none') {
       return null;  // No separate compiler for dartium tests.
     }
-    var name = '${buildDir(configuration)}/${compilerName(configuration)}';
+    var name = configuration['frog'];
+    if (name == '') {
+      name = '${buildDir(configuration)}/${compilerName(configuration)}';
+    }
     if (!(new File(name)).existsSync() && !configuration['list']) {
       throw "Executable '$name' does not exist";
     }
     return name;
   }
 
   static String outputDir(Map configuration) {
     var result = '';
     var system = configuration['system'];
     if (system == 'linux') {
@@ skipping 89 matching lines @@
  * $noCrash tests are expected to be flaky but not crash
  * $pass tests are expected to pass
  * $failOk tests are expected to fail that we won't fix
  * $fail tests are expected to fail that we should fix
  * $crash tests are expected to crash that we should fix
  * $timeout tests are allowed to timeout
 """;
     print(report);
    }
 }