replace OVERRIDE and FINAL with override and final in base/

base/memory/discardable_memory_ashmem.h

Index: base/memory/discardable_memory_ashmem.h
diff --git a/base/memory/discardable_memory_ashmem.h b/base/memory/discardable_memory_ashmem.h
index 8436f5d8ece1176728dd009ae9b265514921347b..392f29004f3a98568d74807e8eed50fb2281ebad 100644
--- a/base/memory/discardable_memory_ashmem.h
+++ b/base/memory/discardable_memory_ashmem.h
@@ -30,14 +30,14 @@ class DiscardableMemoryAshmem
   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_;