replace OVERRIDE and FINAL with override and final in base/

BUG=417463

Review URL: https://codereview.chromium.org/611153004

Cr-Commit-Position: refs/heads/master@{#298520}
diff --git a/base/observer_list_unittest.cc b/base/observer_list_unittest.cc
index 1bda3dc..3df8db0 100644
--- a/base/observer_list_unittest.cc
+++ b/base/observer_list_unittest.cc
@@ -26,7 +26,7 @@
 class Adder : public Foo {
  public:
   explicit Adder(int scaler) : total(0), scaler_(scaler) {}
-  virtual void Observe(int x) OVERRIDE {
+  virtual void Observe(int x) override {
     total += x * scaler_;
   }
   virtual ~Adder() {}
@@ -43,7 +43,7 @@
         doomed_(doomed) {
   }
   virtual ~Disrupter() {}
-  virtual void Observe(int x) OVERRIDE {
+  virtual void Observe(int x) override {
     list_->RemoveObserver(doomed_);
   }
 
@@ -59,7 +59,7 @@
         doomed_(doomed) {
   }
   virtual ~ThreadSafeDisrupter() {}
-  virtual void Observe(int x) OVERRIDE {
+  virtual void Observe(int x) override {
     list_->RemoveObserver(doomed_);
   }
 
@@ -77,7 +77,7 @@
         adder(1) {
   }
 
-  virtual void Observe(int x) OVERRIDE {
+  virtual void Observe(int x) override {
     if (!added) {
       added = true;
       observer_list->AddObserver(&adder);
@@ -112,7 +112,7 @@
   virtual ~AddRemoveThread() {
   }
 
-  virtual void ThreadMain() OVERRIDE {
+  virtual void ThreadMain() override {
     loop_ = new MessageLoop();  // Fire up a message loop.
     loop_->PostTask(
         FROM_HERE,
@@ -153,7 +153,7 @@
     loop_->PostTask(FROM_HERE, MessageLoop::QuitWhenIdleClosure());
   }
 
-  virtual void Observe(int x) OVERRIDE {
+  virtual void Observe(int x) override {
     count_observes_++;
 
     // If we're getting called after we removed ourselves from
@@ -329,7 +329,7 @@
     foos_.push_back(foo);
   }
 
-  virtual void Observe(int x) OVERRIDE {
+  virtual void Observe(int x) override {
     std::vector<Foo*> tmp;
     tmp.swap(foos_);
     for (std::vector<Foo*>::iterator it = tmp.begin();
@@ -481,7 +481,7 @@
   explicit AddInClearObserve(ObserverList<Foo>* list)
       : list_(list), added_(false), adder_(1) {}
 
-  virtual void Observe(int /* x */) OVERRIDE {
+  virtual void Observe(int /* x */) override {
     list_->Clear();
     list_->AddObserver(&adder_);
     added_ = true;
@@ -526,7 +526,7 @@
   explicit ListDestructor(ObserverList<Foo>* list) : list_(list) {}
   virtual ~ListDestructor() {}
 
-  virtual void Observe(int x) OVERRIDE {
+  virtual void Observe(int x) override {
     delete list_;
   }