Move mojo and mojom from mojo/public/dart to mojo/dart/packages

mojo/dart/packages/mojom/test/generate_test.dart

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 import 'dart:async';
 import 'dart:io';
 
 import 'package:mojom/src/command_runner.dart';
 import 'package:mojom/src/utils.dart';
 import 'package:path/path.dart' as path;
 import 'package:unittest/unittest.dart';
 
 final singlePacakgeMojomContents = '''
 [DartPackage="single_package"]
 module single_package;
 struct SinglePackage {
   int32 thingo;
 };
 ''';
 
 Future runCommand(List<String> args) {
   return new MojomCommandRunner().run(args);
 }
 
 main() async {
   String mojoSdk;
   if (Platform.environment['MOJO_SDK'] != null) {
     mojoSdk = Platform.environment['MOJO_SDK'];
   } else {
-    mojoSdk = path.normalize(
-        path.join(path.dirname(Platform.script.path), '..', '..', '..'));
+    mojoSdk = path.normalize(path.join(
+        path.dirname(Platform.script.path), '..', '..', '..', '..', 'public'));
   }
   if (!await new Directory(mojoSdk).exists()) {
     fail("Could not find the Mojo SDK");
   }
 
   final scriptPath = path.dirname(Platform.script.path);
 
   // //test_mojoms/mojom
   final testMojomPath = path.join(scriptPath, 'test_mojoms');
 
@@ skipping 67 matching lines @@
           singlePackageLibPath, 'single_package', 'single_package.mojom.dart');
       final resultFile = new File(resultPath);
       expect(await resultFile.exists(), isTrue);
 
       // There should be no stray .mojoms file haning around.
       final mojomsFile = new File(singlePackageMojomsPath);
       expect(await mojomsFile.exists(), isFalse);
     });
   });
 }