Standardize usage of virtual/override/final specifiers.

content/browser/fileapi/file_system_context_unittest.cc

 // Copyright 2013 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 "storage/browser/fileapi/file_system_context.h"
 
 #include "base/files/scoped_temp_dir.h"
 #include "base/message_loop/message_loop.h"
 #include "base/strings/stringprintf.h"
 #include "content/browser/quota/mock_quota_manager.h"
@@ skipping 31 matching lines @@
       "filesystem:http://chromium.org/%s/%s/root/file",
       type_str.c_str(),
       fs_id.c_str());
   return GURL(url_str);
 }
 
 class FileSystemContextTest : public testing::Test {
  public:
   FileSystemContextTest() {}
 
-  virtual void SetUp() {
+  void SetUp() override {
     ASSERT_TRUE(data_dir_.CreateUniqueTempDir());
 
     storage_policy_ = new MockSpecialStoragePolicy();
 
     mock_quota_manager_ =
         new MockQuotaManager(false /* is_incognito */,
                                     data_dir_.path(),
                                     base::MessageLoopProxy::current().get(),
                                     base::MessageLoopProxy::current().get(),
                                     storage_policy_.get());
@@ skipping 299 matching lines @@
   EXPECT_TRUE(context->CanServeURLRequest(cracked_url));
 
   ExternalMountPoints::GetSystemInstance()->RevokeFileSystem(
       kExternalMountName);
   IsolatedContext::GetInstance()->RevokeFileSystem(isolated_fs_id);
 }
 
 }  // namespace
 
 }  // namespace content