Standardize usage of virtual/override/final in base/

base/memory/discardable_memory_manager_unittest.cc

 // Copyright 2014 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 "base/memory/discardable_memory_manager.h"
 
 #include "base/bind.h"
 #include "base/synchronization/waitable_event.h"
 #include "base/threading/thread.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace base {
 namespace {
 
 class TestAllocationImpl : public internal::DiscardableMemoryManagerAllocation {
  public:
   TestAllocationImpl() : is_allocated_(false), is_locked_(false) {}
-  virtual ~TestAllocationImpl() { DCHECK(!is_locked_); }
+  ~TestAllocationImpl() override { DCHECK(!is_locked_); }
 
   // Overridden from internal::DiscardableMemoryManagerAllocation:
-  virtual bool AllocateAndAcquireLock() override {
+  bool AllocateAndAcquireLock() override {
     bool was_allocated = is_allocated_;
     is_allocated_ = true;
     DCHECK(!is_locked_);
     is_locked_ = true;
     return was_allocated;
   }
-  virtual void ReleaseLock() override {
+  void ReleaseLock() override {
     DCHECK(is_locked_);
     is_locked_ = false;
   }
-  virtual void Purge() override {
+  void Purge() override {
     DCHECK(is_allocated_);
     is_allocated_ = false;
   }
 
   bool is_locked() const { return is_locked_; }
 
  private:
   bool is_allocated_;
   bool is_locked_;
 };
 
 // Tests can assume that the default limit is at least 1024. Tests that rely on
 // something else needs to explicit set the limit.
 const size_t kDefaultMemoryLimit = 1024;
 const size_t kDefaultSoftMemoryLimit = kDefaultMemoryLimit;
 
 class TestDiscardableMemoryManagerImpl
     : public internal::DiscardableMemoryManager {
  public:
   TestDiscardableMemoryManagerImpl()
       : DiscardableMemoryManager(kDefaultMemoryLimit,
                                  kDefaultSoftMemoryLimit,
                                  TimeDelta::Max()) {}
 
   void SetNow(TimeTicks now) { now_ = now; }
 
  private:
   // Overriden from internal::DiscardableMemoryManager:
-  virtual TimeTicks Now() const override { return now_; }
+  TimeTicks Now() const override { return now_; }
 
   TimeTicks now_;
 };
 
 class DiscardableMemoryManagerTestBase {
  public:
   DiscardableMemoryManagerTestBase() {}
 
  protected:
   enum LockStatus {
@@ skipping 409 matching lines @@
            Unretained(this)));
   memory_usage_thread_.message_loop()->PostTask(
       FROM_HERE,
       Bind(&ThreadedDiscardableMemoryManagerTest::SignalHelper,
            Unretained(this)));
   thread_sync_.Wait();
 }
 
 }  // namespace
 }  // namespace base