Replace OVERRIDE and FINAL with override and final in content/child/[a-s]*

content/child/webthread_impl.cc

Index: content/child/webthread_impl.cc
diff --git a/content/child/webthread_impl.cc b/content/child/webthread_impl.cc
index 1f3097a268214841e360392e51893009dd8b06d3..1f40b08bdcdd94adb3a4256335be77ab98884fe0 100644
--- a/content/child/webthread_impl.cc
+++ b/content/child/webthread_impl.cc
@@ -24,11 +24,11 @@ class WebThreadBase::TaskObserverAdapter
   TaskObserverAdapter(WebThread::TaskObserver* observer)
       : observer_(observer) {}
 
-  virtual void WillProcessTask(const base::PendingTask& pending_task) OVERRIDE {
+  virtual void WillProcessTask(const base::PendingTask& pending_task) override {
     observer_->willProcessTask();
   }
 
-  virtual void DidProcessTask(const base::PendingTask& pending_task) OVERRIDE {
+  virtual void DidProcessTask(const base::PendingTask& pending_task) override {
     observer_->didProcessTask();
   }