Move NPAPI test plugin to content/test/plugin.

content/test/plugin/plugin_npobject_identity_test.h

 // Copyright (c) 2011 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.
-#ifndef WEBKIT_PLUGINS_NPAPI_TEST_PLUGIN_NPOBJECT_IDENTITY_TEST_H_
-#define WEBKIT_PLUGINS_NPAPI_TEST_PLUGIN_NPOBJECT_IDENTITY_TEST_H_
+#ifndef CONTENT_TEST_PLUGIN_PLUGIN_NPOBJECT_IDENTITY_TEST_H_
+#define CONTENT_TEST_PLUGIN_PLUGIN_NPOBJECT_IDENTITY_TEST_H_
 
-#include "webkit/plugins/npapi/test/plugin_test.h"
+#include "base/compiler_specific.h"
+#include "content/test/plugin/plugin_test.h"
 
 namespace NPAPIClient {
 
 // The NPObjectProxyTest tests that when we proxy an NPObject that is itself
 // a proxy, we don't create a new proxy but instead just use the original
 // pointer.
 
 class NPObjectIdentityTest : public PluginTest {
  public:
   // Constructor.
   NPObjectIdentityTest(NPP id, NPNetscapeFuncs *host_functions);
 
   // NPAPI SetWindow handler.
   virtual NPError SetWindow(NPWindow* pNPWindow) OVERRIDE;
 };
 
 }  // namespace NPAPIClient
 
-#endif  // WEBKIT_PLUGINS_NPAPI_TEST_PLUGIN_NPOBJECT_IDENTITY_TEST_H_
+#endif  // CONTENT_TEST_PLUGIN_PLUGIN_NPOBJECT_IDENTITY_TEST_H_