Move NPAPI test plugin to content/test/plugin.

content/test/plugin/plugin_private_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_PRIVATE_TEST_H_
-#define WEBKIT_PLUGINS_NPAPI_TEST_PLUGIN_PRIVATE_TEST_H_
+#ifndef CONTENT_TEST_PLUGIN_PLUGIN_PRIVATE_TEST_H_
+#define CONTENT_TEST_PLUGIN_PLUGIN_PRIVATE_TEST_H_
 
 #include "base/compiler_specific.h"
-#include "webkit/plugins/npapi/test/plugin_test.h"
+#include "content/test/plugin/plugin_test.h"
 
 namespace NPAPIClient {
 
 // The PluginPrivateTest tests that a plugin can query if the browser is in
 // private browsing mode.
 class PrivateTest : public PluginTest {
  public:
   PrivateTest(NPP id, NPNetscapeFuncs *host_functions);
 
   // Initialize this PluginTest based on the arguments from NPP_New.
   virtual NPError New(uint16 mode, int16 argc, const char* argn[],
                       const char* argv[], NPSavedData* saved) OVERRIDE;
 };
 
 }  // namespace NPAPIClient
 
-#endif  // WEBKIT_PLUGINS_NPAPI_TEST_PLUGIN_PRIVATE_TEST_H_
+#endif  // CONTENT_TEST_PLUGIN_PLUGIN_PRIVATE_TEST_H_