Disable NaCl browser_tests for GN builds.

chrome/browser/prerender/prerender_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 <deque>
 #include <vector>
 
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/files/file_path.h"
@@ skipping 4028 matching lines @@
 
   // Navigate to the URL entered.
   omnibox_view->model()->AcceptInput(CURRENT_TAB, false);
 
   // Prerender should be running, but abandoned.
   EXPECT_TRUE(
       GetAutocompleteActionPredictor()->IsPrerenderAbandonedForTesting());
 }
 
 // Can't run tests with NaCl plugins if built with DISABLE_NACL.
-#if !defined(DISABLE_NACL)
+#if !defined(DISABLE_NACL) && !defined(DISABLE_NACL_BROWSERTESTS)
 class PrerenderBrowserTestWithNaCl : public PrerenderBrowserTest {
  public:
   PrerenderBrowserTestWithNaCl() {}
   ~PrerenderBrowserTestWithNaCl() override {}
 
   void SetUpCommandLine(base::CommandLine* command_line) override {
     PrerenderBrowserTest::SetUpCommandLine(command_line);
     command_line->AppendSwitch(switches::kEnableNaCl);
   }
 };
@@ skipping 81 matching lines @@
 
   NavigateToDestURL();
   EXPECT_EQ(1U, task_manager.tasks().size());
 }
 
 }  // namespace
 
 #endif  // defined(ENABLE_TASK_MANAGER)
 
 }  // namespace prerender