Move NPAPI test plugin to content/test/plugin.

webkit/plugins/npapi/test/plugin_delete_plugin_in_stream_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_DELETE_PLUGIN_IN_STREAM_TEST_H_
-#define WEBKIT_PLUGINS_NPAPI_TEST_PLUGIN_DELETE_PLUGIN_IN_STREAM_TEST_H_
-
-#include "base/compiler_specific.h"
-#include "webkit/plugins/npapi/test/plugin_test.h"
-
-namespace NPAPIClient {
-
-// This class tests
-class DeletePluginInStreamTest : public PluginTest {
- public:
-  // Constructor.
-  DeletePluginInStreamTest(NPP id, NPNetscapeFuncs *host_functions);
-  //
-  // NPAPI functions
-  //
-  virtual NPError SetWindow(NPWindow* pNPWindow) OVERRIDE;
-  virtual NPError NewStream(NPMIMEType type, NPStream* stream,
-                            NPBool seekable, uint16* stype) OVERRIDE;
- private:
-  bool test_started_;
-  std::string self_url_;
-};
-
-}  // namespace NPAPIClient
-
-#endif  // WEBKIT_PLUGINS_NPAPI_TEST_PLUGIN_DELETE_PLUGIN_IN_STREAM_TEST_H_