Move NPAPI test plugin to content/test/plugin.

content/test/plugin/plugin_delete_plugin_in_stream_test.cc

Index: content/test/plugin/plugin_delete_plugin_in_stream_test.cc
===================================================================
--- content/test/plugin/plugin_delete_plugin_in_stream_test.cc	(revision 0)
+++ content/test/plugin/plugin_delete_plugin_in_stream_test.cc	(working copy)
@@ -2,9 +2,9 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#include "webkit/plugins/npapi/test/plugin_delete_plugin_in_stream_test.h"
+#include "content/test/plugin/plugin_delete_plugin_in_stream_test.h"
 
-#include "webkit/plugins/npapi/test/plugin_client.h"
+#include "content/test/plugin/plugin_client.h"
 
 namespace NPAPIClient {