Standardize usage of virtual/override/final specifiers.

content/renderer/media/crypto/key_systems_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 <string>
 #include <vector>
 
 #include "content/public/common/content_client.h"
 #include "content/public/renderer/content_renderer_client.h"
 #include "content/renderer/media/crypto/key_systems.h"
@@ skipping 146 matching lines @@
     // The TestContentClient is not available inside Death Tests on some
     // platforms (see below). Therefore, always provide a TestContentClient.
     // Explanation: When Death Tests fork, there is a valid ContentClient.
     // However, when they launch a new process instead of forking, the global
     // variable is not copied and for some reason TestContentClientInitializer
     // does not get created to set the global variable in the new process.
     SetContentClient(&test_content_client_);
     SetRendererClientForTesting(&content_renderer_client_);
   }
 
-  virtual void SetUp() override {
-    AddContainerAndCodecMasksForTest();
-  }
+  void SetUp() override { AddContainerAndCodecMasksForTest(); }
 
-  virtual ~KeySystemsTest() {
+  ~KeySystemsTest() override {
     // Clear the use of content_client_, which was set in SetUp().
     SetContentClient(NULL);
   }
 
   typedef std::vector<std::string> CodecVector;
 
   const CodecVector& no_codecs() const { return no_codecs_; }
 
   const CodecVector& vp8_codec() const { return vp8_codec_; }
   const CodecVector& vp80_codec() const { return vp80_codec_; }
@@ skipping 460 matching lines @@
 
 #if defined(WIDEVINE_CDM_AVAILABLE)
   const char* const kTestWidevineUmaName = "Widevine";
 #else
   const char* const kTestWidevineUmaName = "Unknown";
 #endif
   EXPECT_EQ(kTestWidevineUmaName, KeySystemNameForUMA("com.widevine.alpha"));
 }
 
 }  // namespace content