Update {virtual,override,final} to follow C++11 style in chrome/browser/chromeos/drive.

chrome/browser/chromeos/drive/search_metadata_unittest.cc

 // Copyright (c) 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 "chrome/browser/chromeos/drive/search_metadata.h"
 
 #include "base/files/file_util.h"
 #include "base/files/scoped_temp_dir.h"
 #include "base/i18n/string_search.h"
 #include "base/message_loop/message_loop_proxy.h"
@@ skipping 22 matching lines @@
     std::string* highlighted_text) {
   base::i18n::FixedPatternStringSearchIgnoringCaseAndAccents query(
       base::UTF8ToUTF16(query_text));
   return FindAndHighlight(text, &query, highlighted_text);
 }
 
 }  // namespace
 
 class SearchMetadataTest : public testing::Test {
  protected:
-  virtual void SetUp() override {
+  void SetUp() override {
     ASSERT_TRUE(temp_dir_.CreateUniqueTempDir());
     fake_free_disk_space_getter_.reset(new FakeFreeDiskSpaceGetter);
 
     metadata_storage_.reset(new ResourceMetadataStorage(
         temp_dir_.path(), base::MessageLoopProxy::current().get()));
     ASSERT_TRUE(metadata_storage_->Initialize());
 
     cache_.reset(new FileCache(metadata_storage_.get(),
                                temp_dir_.path(),
                                base::MessageLoopProxy::current().get(),
@@ skipping 464 matching lines @@
 }
 
 TEST(SearchMetadataSimpleTest, FindAndHighlight_MoreMetaChars) {
   std::string highlighted_text;
   EXPECT_TRUE(FindAndHighlightWrapper("a&b&c&d", "b&c", &highlighted_text));
   EXPECT_EQ("a&amp;<b>b&amp;c</b>&amp;d", highlighted_text);
 }
 
 }  // namespace internal
 }  // namespace drive