replace OVERRIDE and FINAL with override and final in base/

base/memory/discardable_memory_emulated.h

Index: base/memory/discardable_memory_emulated.h
diff --git a/base/memory/discardable_memory_emulated.h b/base/memory/discardable_memory_emulated.h
index d928513527ea895f1e44ebd3a0415bfe446e3319..33889ad9a6d4686e5f91572425bfab763ab9eb15 100644
--- a/base/memory/discardable_memory_emulated.h
+++ b/base/memory/discardable_memory_emulated.h
@@ -31,14 +31,14 @@ class DiscardableMemoryEmulated
   bool Initialize();
 
   // Overridden from DiscardableMemory:
-  virtual DiscardableMemoryLockStatus Lock() OVERRIDE;
-  virtual void Unlock() OVERRIDE;
-  virtual void* Memory() const OVERRIDE;
+  virtual DiscardableMemoryLockStatus Lock() override;
+  virtual void Unlock() override;
+  virtual void* Memory() const override;
 
   // Overridden from internal::DiscardableMemoryManagerAllocation:
-  virtual bool AllocateAndAcquireLock() OVERRIDE;
-  virtual void ReleaseLock() OVERRIDE {}
-  virtual void Purge() OVERRIDE;
+  virtual bool AllocateAndAcquireLock() override;
+  virtual void ReleaseLock() override {}
+  virtual void Purge() override;
 
  private:
   const size_t bytes_;