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

android_webview/native/aw_web_contents_delegate.cc

Index: android_webview/native/aw_web_contents_delegate.cc
diff --git a/android_webview/native/aw_web_contents_delegate.cc b/android_webview/native/aw_web_contents_delegate.cc
new file mode 100644
index 0000000000000000000000000000000000000000..73021281e067b482292ed45f64d697085dc0ba96
--- /dev/null
+++ b/android_webview/native/aw_web_contents_delegate.cc
@@ -0,0 +1,18 @@
+// 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/aw_web_contents_delegate.h"
+
+namespace android_webview {
+
+AwWebContentsDelegate::AwWebContentsDelegate(
+    JNIEnv* env,
+    jobject obj)
+    : WebContentsDelegateAndroid(env, obj) {
+}
+
+AwWebContentsDelegate::~AwWebContentsDelegate() {
+}
+
+}  // namespace android_webview