[Android WebViewShell] Make WebViewLayoutTest runnable with test_runner.py

android_webview/android_webview_shell.gyp

 # 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.
 {
   'targets': [
     {
       'target_name': 'android_webview_shell_apk',
       'type': 'none',
+      'dependencies': [
+        '../base/base.gyp:base_java_test_support',
+      ],
       'variables': {
         'apk_name': 'AndroidWebViewShell',
         'java_in_dir': 'tools/WebViewShell',
         'resource_dir': 'tools/WebViewShell/res',
+        'is_test_apk': 1,
+        'test_type': 'instrumentation',
+        'isolate_file': 'android_webview_shell_test_apk.isolate',
       },
-      'includes': [ '../build/java_apk.gypi' ],
+      'includes': [
+        '../build/java_apk.gypi',
+        '../build/android/test_runner.gypi',
+      ],
     },
   ],
 }