Standardize usage of virtual/override/final in net/

net/disk_cache/blockfile/mapped_file_unittest.cc

 // Copyright (c) 2011 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/basictypes.h"
 #include "base/files/file_path.h"
 #include "base/strings/string_util.h"
 #include "net/disk_cache/blockfile/file_block.h"
 #include "net/disk_cache/blockfile/mapped_file.h"
 #include "net/disk_cache/disk_cache_test_base.h"
 #include "net/disk_cache/disk_cache_test_util.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace {
 
 // Implementation of FileIOCallback for the tests.
 class FileCallbackTest: public disk_cache::FileIOCallback {
  public:
   FileCallbackTest(int id, MessageLoopHelper* helper, int* max_id)
       : id_(id),
         helper_(helper),
         max_id_(max_id) {
   }
-  virtual ~FileCallbackTest() {}
+  ~FileCallbackTest() override {}
 
-  virtual void OnFileIOComplete(int bytes_copied) override;
+  void OnFileIOComplete(int bytes_copied) override;
 
  private:
   int id_;
   MessageLoopHelper* helper_;
   int* max_id_;
 };
 
 void FileCallbackTest::OnFileIOComplete(int bytes_copied) {
   if (id_ > *max_id_) {
     NOTREACHED();
     helper_->set_callback_reused_error(true);
   }
 
   helper_->CallbackWasCalled();
 }
 
 class TestFileBlock : public disk_cache::FileBlock {
  public:
   TestFileBlock() {
     CacheTestFillBuffer(buffer_, sizeof(buffer_), false);
   }
-  virtual ~TestFileBlock() {}
+  ~TestFileBlock() override {}
 
   // FileBlock interface.
-  virtual void* buffer() const override { return const_cast<char*>(buffer_); }
-  virtual size_t size() const override { return sizeof(buffer_); }
-  virtual int offset() const override { return 1024; }
+  void* buffer() const override { return const_cast<char*>(buffer_); }
+  size_t size() const override { return sizeof(buffer_); }
+  int offset() const override { return 1024; }
 
  private:
   char buffer_[20];
 };
 
 }  // namespace
 
 TEST_F(DiskCacheTest, MappedFile_SyncIO) {
   base::FilePath filename = cache_path_.AppendASCII("a_test");
   scoped_refptr<disk_cache::MappedFile> file(new disk_cache::MappedFile);
@@ skipping 68 matching lines @@
   if (!completed)
     expected++;
 
   helper.WaitUntilCacheIoFinished(expected);
 
   EXPECT_EQ(expected, helper.callbacks_called());
   EXPECT_FALSE(helper.callback_reused_error());
   EXPECT_STREQ(static_cast<char*>(file_block1.buffer()),
                static_cast<char*>(file_block2.buffer()));
 }