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

src/base/platform/condition-variable.h

Index: src/base/platform/condition-variable.h
diff --git a/src/base/platform/condition-variable.h b/src/base/platform/condition-variable.h
index b5a6c3f5d7357db19d27fb478cce6cc7aef78a91..9cb706460fc0b8ca1b45e9868d7af9aca20924c6 100644
--- a/src/base/platform/condition-variable.h
+++ b/src/base/platform/condition-variable.h
@@ -28,7 +28,7 @@ class TimeDelta;
 // the mutex and suspend the execution of the calling thread. When the condition
 // variable is notified, the thread is awakened, and the mutex is reacquired.
 
-class ConditionVariable FINAL {
+class ConditionVariable final {
  public:
   ConditionVariable();
   ~ConditionVariable();
@@ -63,7 +63,7 @@ class ConditionVariable FINAL {
   typedef pthread_cond_t NativeHandle;
 #elif V8_OS_WIN
   struct Event;
-  class NativeHandle FINAL {
+  class NativeHandle final {
    public:
     NativeHandle() : waitlist_(NULL), freelist_(NULL) {}
     ~NativeHandle();