[Android] JUnit runner + gyp changes.

testing/android/junit/junit_test.gyp

+# Copyright 2014 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.
+
+{
+  'targets': [
+    {
+      'target_name': 'junit_test_support',
+      'type': 'none',
+      'dependencies': [
+        '../../../third_party/junit/junit.gyp:junit_jar',
+      ],
+      'variables': {
+        'src_paths': [
+          'java/src',
+        ],
+      },
+      'includes': [
+        '../../../build/host_jar.gypi',
+      ],
+    },
+    {
+      'target_name': 'junit_unit_tests',
+      'type': 'none',
+      'dependencies': [
+        'junit_test_support',
+      ],
+      'variables': {
+        'main_class': 'org.chromium.testing.local.JunitTestMain',
+        'src_paths': [
+          'javatests/src',
+        ],
+      },
+      'includes': [
+        '../../../build/host_jar.gypi',
+      ],
+    },
+  ],
+}