Standardize usage of virtual/override/final specifiers.

chrome/browser/google/google_search_counter_unittest.cc

Index: chrome/browser/google/google_search_counter_unittest.cc
diff --git a/chrome/browser/google/google_search_counter_unittest.cc b/chrome/browser/google/google_search_counter_unittest.cc
index faee2efdeba16f9cd33e16b9e4f594ae808ec56d..a2a0625b0e07eeaa4e5d71481c158a024ac3cbe0 100644
--- a/chrome/browser/google/google_search_counter_unittest.cc
+++ b/chrome/browser/google/google_search_counter_unittest.cc
@@ -25,11 +25,11 @@ class MockSearchMetrics : public GoogleSearchMetrics {
 class GoogleSearchCounterTest : public testing::Test {
  protected:
   GoogleSearchCounterTest();
-  virtual ~GoogleSearchCounterTest();
+  ~GoogleSearchCounterTest() override;
 
   // testing::Test
-  virtual void SetUp();
-  virtual void TearDown();
+  void SetUp() override;
+  void TearDown() override;
 
   // Test if |url| is a Google search for specific types. When |is_omnibox| is
   // true, this method will append Omnibox identifiers to the simulated URL