replace OVERRIDE and FINAL with override and final in base/

base/debug/trace_event_memory.cc

Index: base/debug/trace_event_memory.cc
diff --git a/base/debug/trace_event_memory.cc b/base/debug/trace_event_memory.cc
index 3c468278a15bcce12787067053adc1482bd8e92c..5cb09087f57fa404eedee214ef9c80ec3069d0aa 100644
--- a/base/debug/trace_event_memory.cc
+++ b/base/debug/trace_event_memory.cc
@@ -33,7 +33,7 @@ class MemoryDumpHolder : public base::debug::ConvertableToTraceFormat {
   explicit MemoryDumpHolder(char* dump) : dump_(dump) {}
 
   // base::debug::ConvertableToTraceFormat overrides:
-  virtual void AppendAsTraceFormat(std::string* out) const OVERRIDE {
+  virtual void AppendAsTraceFormat(std::string* out) const override {
     AppendHeapProfileAsTraceFormat(dump_, out);
   }