Standardize usage of virtual/override/final specifiers.

media/base/seekable_buffer_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 <cstdlib>
 
 #include "base/logging.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/time/time.h"
 #include "media/base/data_buffer.h"
 #include "media/base/seekable_buffer.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace media {
 
 class SeekableBufferTest : public testing::Test {
  public:
   SeekableBufferTest() : buffer_(kBufferSize, kBufferSize) {
   }
 
  protected:
   static const int kDataSize = 409600;
   static const int kBufferSize = 4096;
   static const int kWriteSize = 512;
 
-  virtual void SetUp() {
+  void SetUp() override {
     // Note: We use srand() and rand() rather than base::RandXXX() to improve
     // unit test performance.  We don't need good random numbers, just
     // something that generates "mixed data."
     const unsigned int kKnownSeed = 0x98765432;
     srand(kKnownSeed);
 
     // Create random test data samples.
     for (int i = 0; i < kDataSize; i++)
       data_[i] = static_cast<char>(rand());
   }
@@ skipping 309 matching lines @@
     EXPECT_EQ(tests[i].expected_time, actual) << "With test = { start:"
         << tests[i].first_time_useconds << ", duration:"
         << tests[i].duration_useconds << ", consumed:"
         << tests[i].consume_bytes << " }\n";
 
     buffer_.Clear();
   }
 }
 
 }  // namespace media