Add a new class as an entry-point for Java reflection

android_webview/glue/BUILD.gn

 # 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("//build/config/android/config.gni")
 import("//build/config/android/rules.gni")
 import("generate_resource_rewriter.gni")
 import("glue.gni")
 
 # There are two copies of this file: one upstream and one downstream,
@@ skipping 60 matching lines @@
     "java/src/com/android/webview/chromium/WebBackForwardListChromium.java",
     "java/src/com/android/webview/chromium/WebHistoryItemChromium.java",
     "java/src/com/android/webview/chromium/WebIconDatabaseAdapter.java",
     "java/src/com/android/webview/chromium/WebMessagePortAdapter.java",
     "java/src/com/android/webview/chromium/WebStorageAdapter.java",
     "java/src/com/android/webview/chromium/WebViewChromiumFactoryProvider.java",
     "java/src/com/android/webview/chromium/WebViewChromium.java",
     "java/src/com/android/webview/chromium/WebViewContentsClientAdapter.java",
     "java/src/com/android/webview/chromium/WebViewDatabaseAdapter.java",
     "java/src/com/android/webview/chromium/WebViewDelegateFactory.java",
+    "java/src/com/android/webview/chromium/reflection/WebViewConfig.java",
   ]
 }