Add initial Chromium TestShell support for Android

chrome/android/testshell/testshell_stubs.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 "chrome/browser/android/tab_android.h"
+#include "chrome/browser/autofill/autofill_external_delegate.h"
+
+// This file contains temporary stubs to allow the libtestshell target to
+// compile. They will be removed once real implementations are
+// written/upstreamed, or once other code is refactored to eliminate the
+// need for them.
+
+// static
+TabAndroid* TabAndroid::FromWebContents(content::WebContents* web_contents) {
+  return NULL;
+}
+
+// static
+AutofillExternalDelegate* AutofillExternalDelegate::Create(
+    TabContents* tab_contents,
+    AutofillManager* manager) {
+  return NULL;
+}