Standardize usage of virtual/override/final specifiers.

content/browser/media/webrtc_aecdump_browsertest.cc

 // Copyright (c) 2014 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/process/process_handle.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/stringprintf.h"
 #include "content/browser/media/webrtc_internals.h"
 #include "content/browser/web_contents/web_contents_impl.h"
 #include "content/public/test/browser_test_utils.h"
@@ skipping 20 matching lines @@
   return it.IsAtEnd();
 }
 
 }  // namespace
 
 namespace content {
 
 class WebRtcAecDumpBrowserTest : public WebRtcContentBrowserTest {
  public:
   WebRtcAecDumpBrowserTest() {}
-  virtual ~WebRtcAecDumpBrowserTest() {}
+  ~WebRtcAecDumpBrowserTest() override {}
 };
 
 #if defined(OS_WIN)
 #define IntToStringType base::IntToString16
 #else
 #define IntToStringType base::IntToString
 #endif
 
 #if defined(OS_LINUX) && !defined(OS_CHROMEOS) && defined(ARCH_CPU_ARM_FAMILY)
 // Timing out on ARM linux bot: http://crbug.com/238490
@@ skipping 172 matching lines @@
     EXPECT_TRUE(base::PathExists(unique_dump_file));
     int64 file_size = 0;
     EXPECT_TRUE(base::GetFileSize(unique_dump_file, &file_size));
     EXPECT_GT(file_size, 0);
 
     base::DeleteFile(unique_dump_file, false);
   }
 }
 
 }  // namespace content