Update {virtual,override} to follow C++11 style in chrome.

chrome/browser/pdf/pdf_extension_test.cc

 // Copyright 2014 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 "base/base_paths.h"
 #include "base/files/file_util.h"
 #include "base/path_service.h"
 #include "chrome/browser/extensions/component_loader.h"
 #include "chrome/browser/extensions/extension_apitest.h"
 #include "chrome/browser/extensions/extension_service.h"
 #include "chrome/browser/ui/tabs/tab_strip_model.h"
 #include "chrome/common/chrome_paths.h"
 #include "chrome/common/chrome_switches.h"
 #include "chrome/test/base/ui_test_utils.h"
 #include "content/public/browser/plugin_service.h"
 #include "content/public/test/browser_test_utils.h"
 #include "extensions/browser/extension_registry.h"
 #include "extensions/common/manifest_handlers/mime_types_handler.h"
 #include "extensions/test/result_catcher.h"
 #include "grit/browser_resources.h"
 #include "net/test/embedded_test_server/embedded_test_server.h"
 
 class PDFExtensionTest : public ExtensionApiTest {
  public:
-  virtual ~PDFExtensionTest() {}
+  ~PDFExtensionTest() override {}
 
-  virtual void SetUpCommandLine(base::CommandLine* command_line) override {
+  void SetUpCommandLine(base::CommandLine* command_line) override {
     ExtensionApiTest::SetUpCommandLine(command_line);
     command_line->AppendSwitch(switches::kEnableOutOfProcessPdf);
   }
 
-  virtual void SetUpOnMainThread() override {
+  void SetUpOnMainThread() override {
     ExtensionApiTest::SetUpOnMainThread();
     ASSERT_TRUE(embedded_test_server()->InitializeAndWaitUntilReady());
   }
 
-
-  virtual void TearDownOnMainThread() override {
+  void TearDownOnMainThread() override {
     ASSERT_TRUE(embedded_test_server()->ShutdownAndWaitUntilComplete());
     ExtensionApiTest::TearDownOnMainThread();
   }
 
   void RunTestsInFile(std::string filename, std::string pdf_filename) {
     ExtensionService* service = extensions::ExtensionSystem::Get(
         profile())->extension_service();
     service->component_loader()->Add(IDR_PDF_MANIFEST,
         base::FilePath(FILE_PATH_LITERAL("pdf")));
     const extensions::Extension* extension =
@@ skipping 55 matching lines @@
   RunTestsInFile("navigator_test.js", "test.pdf");
 }
 
 IN_PROC_BROWSER_TEST_F(PDFExtensionTest, ParamsParser) {
   RunTestsInFile("params_parser_test.js", "test.pdf");
 }
 
 IN_PROC_BROWSER_TEST_F(PDFExtensionTest, ZoomManager) {
   RunTestsInFile("zoom_manager_test.js", "test.pdf");
 }