Delete the NPAPI plugin browsertests.

content/test/plugin/plugin_arguments_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 CONTENT_TEST_PLUGIN_PLUGIN_ARGUMENTS_TEST_H_
-#define CONTENT_TEST_PLUGIN_PLUGIN_ARGUMENTS_TEST_H_
-
-#include "base/compiler_specific.h"
-#include "content/test/plugin/plugin_test.h"
-
-namespace NPAPIClient {
-
-// The PluginArgumentsTest test that we properly receive arguments
-// intended for the plugin.
-//
-// This is basically overkill for testing that the arguments passed
-// to the plugin match what we expect.
-//
-// We expect to find the following arguments:
-// mode:  should be the string either "NP_EMBED" or "NP_FULL",
-//        depending on the mode passed in.
-// count: the count of "val" arguments.  If the value is
-//        2, then we'll find arguments "val1" and "val2".  If
-//        the value is 0, then there will be no "val" arguments.
-// size:  each val string will be this size * the value's
-//        index.  E.g if size is "10", val1 will be 10bytes,
-//        and val2 will be 20bytes.
-//
-class PluginArgumentsTest : public PluginTest {
- public:
-  // Constructor.
-  PluginArgumentsTest(NPP id, NPNetscapeFuncs *host_functions);
-
-  // Initialize this PluginTest based on the arguments from NPP_New.
-  NPError New(uint16 mode,
-              int16 argc,
-              const char* argn[],
-              const char* argv[],
-              NPSavedData* saved) override;
-
-  // NPAPI SetWindow handler.
-  NPError SetWindow(NPWindow* pNPWindow) override;
-};
-
-}  // namespace NPAPIClient
-
-#endif  // CONTENT_TEST_PLUGIN_PLUGIN_ARGUMENTS_TEST_H_