Standardize usage of virtual/override/final specifiers.

chrome/browser/net/quota_policy_channel_id_store_unittest.cc

Index: chrome/browser/net/quota_policy_channel_id_store_unittest.cc
diff --git a/chrome/browser/net/quota_policy_channel_id_store_unittest.cc b/chrome/browser/net/quota_policy_channel_id_store_unittest.cc
index 249f6c83c0f4b4e7d0ecd562ea9c8c9e77825f70..f82f6e477208dc28045e815d36e481fec71d7321 100644
--- a/chrome/browser/net/quota_policy_channel_id_store_unittest.cc
+++ b/chrome/browser/net/quota_policy_channel_id_store_unittest.cc
@@ -67,7 +67,7 @@ class QuotaPolicyChannelIDStoreTest : public testing::Test {
     return base::Time::FromUTCExploded(exploded_time);
   }
 
-  virtual void SetUp() {
+  void SetUp() override {
     ASSERT_TRUE(temp_dir_.CreateUniqueTempDir());
     store_ = new QuotaPolicyChannelIDStore(
         temp_dir_.path().Append(kTestChannelIDFilename),
@@ -85,7 +85,7 @@ class QuotaPolicyChannelIDStoreTest : public testing::Test {
                                               "b"));
   }
 
-  virtual void TearDown() {
+  void TearDown() override {
     store_ = NULL;
     loop_.RunUntilIdle();
   }