replace 'virtual ... OVERRIDE' with '... override'

base/memory/discardable_memory_manager_unittest.cc

Index: base/memory/discardable_memory_manager_unittest.cc
diff --git a/base/memory/discardable_memory_manager_unittest.cc b/base/memory/discardable_memory_manager_unittest.cc
index 674499fe0ea0bd98bf6618fbc47dbe4137b6019c..35faaf2f9ca4f5a09d4428908046d747f577a3b6 100644
--- a/base/memory/discardable_memory_manager_unittest.cc
+++ b/base/memory/discardable_memory_manager_unittest.cc
@@ -18,18 +18,18 @@ class TestAllocationImpl : public internal::DiscardableMemoryManagerAllocation {
   virtual ~TestAllocationImpl() { 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;
   }
@@ -58,7 +58,7 @@ class TestDiscardableMemoryManagerImpl
 
  private:
   // Overriden from internal::DiscardableMemoryManager:
-  virtual TimeTicks Now() const OVERRIDE { return now_; }
+  TimeTicks Now() const override { return now_; }
 
   TimeTicks now_;
 };
@@ -456,9 +456,9 @@ class ThreadedDiscardableMemoryManagerTest
       : memory_usage_thread_("memory_usage_thread"),
         thread_sync_(true, false) {}
 
-  virtual void SetUp() OVERRIDE { memory_usage_thread_.Start(); }
+  void SetUp() override { memory_usage_thread_.Start(); }
 
-  virtual void TearDown() OVERRIDE { memory_usage_thread_.Stop(); }
+  void TearDown() override { memory_usage_thread_.Stop(); }
 
   void UseMemoryHelper() {
     size_t size = 1024;