Refactor the Android port to allow access to the chrome layer.

android_webview/native/android_webview_jni_registrar.cc

+// Copyright (c) 2012 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.
+
+#include "android_webview/native/android_webview_jni_registrar.h"
+
+#include "base/android/jni_android.h"
+#include "base/android/jni_registrar.h"
+#include "chrome/browser/component/web_contents_delegate_android/component_jni_registrar.h"
+
+namespace android_webview {
+
+bool RegisterJni(JNIEnv* env) {
+  return chrome::component::web_contents_delegate_android::RegisterJni(env);
+}
+
+} // namespace android_webview