Standardize usage of virtual/override/final specifiers.

chrome/browser/net/evicted_domain_cookie_counter_unittest.cc

Index: chrome/browser/net/evicted_domain_cookie_counter_unittest.cc
diff --git a/chrome/browser/net/evicted_domain_cookie_counter_unittest.cc b/chrome/browser/net/evicted_domain_cookie_counter_unittest.cc
index 85882c1afb091ae2844ee8cd6e7cd3ac94852481..3f7618ccde2821275bcb580902261cee90c50639 100644
--- a/chrome/browser/net/evicted_domain_cookie_counter_unittest.cc
+++ b/chrome/browser/net/evicted_domain_cookie_counter_unittest.cc
@@ -44,11 +44,11 @@ class EvictedDomainCookieCounterTest : public testing::Test {
   };
 
   EvictedDomainCookieCounterTest();
-  virtual ~EvictedDomainCookieCounterTest();
+  ~EvictedDomainCookieCounterTest() override;
 
   // testing::Test implementation.
-  virtual void SetUp() override;
-  virtual void TearDown() override;
+  void SetUp() override;
+  void TearDown() override;
 
   // Initialization that allows parameters to be specified.
   void InitCounter(size_t max_size, size_t purge_count);