Replace OVERRIDE->override and FINAL->final since we now require C++11.

test/unittests/compiler/liveness-analyzer-unittest.cc

Index: test/unittests/compiler/liveness-analyzer-unittest.cc
diff --git a/test/unittests/compiler/liveness-analyzer-unittest.cc b/test/unittests/compiler/liveness-analyzer-unittest.cc
index f7d0db354d3c5299554e242b77c87e0a3bb55f69..d5a95ccd1dbf7c12cc80931aa7d5022821b8486f 100644
--- a/test/unittests/compiler/liveness-analyzer-unittest.cc
+++ b/test/unittests/compiler/liveness-analyzer-unittest.cc
@@ -79,14 +79,14 @@ class LivenessAnalysisTest : public GraphTest {
           locals_count_(locals_count),
           replacement_(replacement) {}
 
-    void DescribeTo(std::ostream* os) const OVERRIDE {
+    void DescribeTo(std::ostream* os) const override {
       *os << "is a frame state with '" << liveness_
           << "' liveness, empty "
              "parameters and empty expression stack";
     }
 
     bool MatchAndExplain(Node* frame_state,
-                         MatchResultListener* listener) const OVERRIDE {
+                         MatchResultListener* listener) const override {
       if (frame_state == NULL) {
         *listener << "which is NULL";
         return false;