Remove NPAPI from browser and utility

chrome/browser/download/download_browsertest.cc

 // Copyright (c) 2012 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.
 
 #include "chrome/browser/download/download_browsertest.h"
 
 #include <stdint.h>
 #include <sstream>
 #include <utility>
 
@@ skipping 419 matching lines @@
     ASSERT_TRUE(InitialSetup());
   }
 
   void TearDownOnMainThread() override {
     // Needs to be torn down on the main thread. file_activity_observer_ holds a
     // reference to the ChromeDownloadManagerDelegate which should be destroyed
     // on the UI thread.
     file_activity_observer_.reset();
   }
 
-  void SetUpCommandLine(base::CommandLine* command_line) override {
-    command_line->AppendSwitch(switches::kDisablePluginsDiscovery);
-  }
-
   // Returning false indicates a failure of the setup, and should be asserted
   // in the caller.
   virtual bool InitialSetup() {
     bool have_test_dir = PathService::Get(chrome::DIR_TEST_DATA, &test_dir_);
     EXPECT_TRUE(have_test_dir);
     if (!have_test_dir)
       return false;
 
     // Sanity check default values for window and tab count.
     int window_count = chrome::GetTotalBrowserCount();
@@ skipping 3214 matching lines @@
 
   scoped_ptr<content::DownloadTestObserver> observer(DangerousDownloadWaiter(
       browser(), 1, content::DownloadTestObserver::ON_DANGEROUS_DOWNLOAD_DENY));
   ui_test_utils::NavigateToURL(browser(), extension_url);
 
   observer->WaitForFinished();
 
   // Download shelf should close.
   EXPECT_FALSE(browser()->window()->IsDownloadShelfVisible());
 }