[Android] JUnit runner + gyp changes.

third_party/junit/junit.gyp

+# Copyright (c) 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.
+
+{
+  'variables': {
+    'hamcrest_jar_name': 'hamcrest-core-1.3.jar',
+    'junit_lib_directory': '../../third_party/junit/src/lib/',
+  },
+  'targets': [
+    {
+      'target_name': 'hamcrest_jar',
+      'type': 'none',
+      'variables': {
+        'src_path': '<(junit_lib_directory)/<(hamcrest_jar_name)',
+        'dest_path': '<(PRODUCT_DIR)/lib.java/<(hamcrest_jar_name)',
+      },
+      'all_dependent_settings': {
+        'variables': {
+          'input_jars_paths': [
+            '<(dest_path)',
+          ],
+        },
+      },
+      'actions': [
+        {
+          'action_name': 'copy_hamcrest',
+          'message': 'Copy <(hamcrest_jar_name) to <(PRODUCT_DIR)/lib.java/',
+          'inputs': [
+            '<(src_path)',
+          ],
+          'outputs': [
+            '<(dest_path)'
+          ],
+          'action': [
+            'python', '../../build/cp.py', '<(src_path)', '<(dest_path)',
+          ],
+        },
+      ],
+    },
+    {
+      'target_name': 'junit_jar',
+      'type': 'none',
+      'dependencies': [
+        'hamcrest_jar',
+      ],
+      'variables': {
+        'src_paths': [ '../../third_party/junit/src/src/main/java' ],
+      },
+      'includes': [
+        '../../build/host_jar.gypi',
+      ],
+    },
+  ],
+}
+