Standardize usage of virtual/override/final in chrome/browser/plugins

chrome/browser/plugins/plugin_installer_unittest.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/plugins/plugin_installer.h"
 
 #include "base/memory/scoped_ptr.h"
 #include "base/run_loop.h"
 #include "chrome/browser/plugins/plugin_installer_observer.h"
 #include "chrome/test/base/chrome_render_view_host_test_harness.h"
@@ skipping 50 matching lines @@
         download_started_(false),
         download_finished_(false),
         download_cancelled_(false) {}
 
   bool download_started() const { return download_started_; }
   bool download_finished() const { return download_finished_; }
   bool download_cancelled() const { return download_cancelled_; }
   const std::string& download_error() const { return download_error_; }
 
  private:
-  virtual void DownloadStarted() override { download_started_ = true; }
-  virtual void DownloadFinished() override { download_finished_ = true; }
-  virtual void DownloadError(const std::string& message) override {
+  void DownloadStarted() override { download_started_ = true; }
+  void DownloadFinished() override { download_finished_ = true; }
+  void DownloadError(const std::string& message) override {
     download_error_ = message;
   }
-  virtual void DownloadCancelled() override { download_cancelled_ = true; }
+  void DownloadCancelled() override { download_cancelled_ = true; }
 
   bool download_started_;
   bool download_finished_;
   std::string download_error_;
   bool download_cancelled_;
 };
 
 // Action for invoking the OnStartedCallback of DownloadURLParameters object
 // which is assumed to be pointed to by arg0.
 ACTION_P2(InvokeOnStartedCallback, download_item, interrupt_reason) {
@@ skipping 93 matching lines @@
   EXPECT_CALL(*download_item, GetState())
       .WillOnce(testing::Return(content::DownloadItem::INTERRUPTED));
   EXPECT_CALL(*download_item, GetLastReason()).WillOnce(
       testing::Return(content::DOWNLOAD_INTERRUPT_REASON_NETWORK_FAILED));
   download_item->NotifyObserversDownloadUpdated();
 
   EXPECT_TRUE(installer_observer.download_started());
   EXPECT_FALSE(installer_observer.download_finished());
   EXPECT_EQ("NETWORK_FAILED", installer_observer.download_error());
 }