Standardize usage of virtual/override/final in net/

net/base/backoff_entry_unittest.cc

 // Copyright (c) 2012 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 "net/base/backoff_entry.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace {
 
 using base::TimeDelta;
 using base::TimeTicks;
 using net::BackoffEntry;
 
 BackoffEntry::Policy base_policy = { 0, 1000, 2.0, 0.0, 20000, 2000, false };
 
 class TestBackoffEntry : public BackoffEntry {
  public:
   explicit TestBackoffEntry(const Policy* const policy)
       : BackoffEntry(policy),
         now_(TimeTicks()) {
     // Work around initialization in constructor not picking up
     // fake time.
     SetCustomReleaseTime(TimeTicks());
   }
 
-  virtual ~TestBackoffEntry() {}
+  ~TestBackoffEntry() override {}
 
-  virtual TimeTicks ImplGetTimeNow() const override {
-    return now_;
-  }
+  TimeTicks ImplGetTimeNow() const override { return now_; }
 
   void set_now(const TimeTicks& now) {
     now_ = now;
   }
 
  private:
   TimeTicks now_;
 
   DISALLOW_COPY_AND_ASSIGN(TestBackoffEntry);
 };
@@ skipping 264 matching lines @@
      custom.set_now(custom.ImplGetTimeNow() + custom.GetTimeUntilRelease());
      custom.InformOfRequest(false);
      ASSERT_TRUE(custom.ShouldRejectRequest());
   }
 
   // Max delay should still be respected.
   EXPECT_EQ(20000, custom.GetTimeUntilRelease().InMilliseconds());
 }
 
 }  // namespace