replace OVERRIDE and FINAL with override and final in chrome/browser/[a-i]*

chrome/browser/download/download_shelf_unittest.cc

Index: chrome/browser/download/download_shelf_unittest.cc
diff --git a/chrome/browser/download/download_shelf_unittest.cc b/chrome/browser/download/download_shelf_unittest.cc
index d2a409446163d4e6c4856ed6a48369bc0de517b0..a1b86fcfd3c57a110f4b01fe92654a2eb431bd51 100644
--- a/chrome/browser/download/download_shelf_unittest.cc
+++ b/chrome/browser/download/download_shelf_unittest.cc
@@ -48,12 +48,12 @@ class DownloadShelfTest : public testing::Test {
   }
   Profile* profile() { return profile_.get(); }
 
-  virtual void SetUp() OVERRIDE {
+  virtual void SetUp() override {
     DownloadServiceFactory::GetInstance()->SetTestingFactory(
         profile(), &CreateDownloadService);
   }
 
-  virtual void TearDown() OVERRIDE {
+  virtual void TearDown() override {
     DownloadServiceFactory::GetInstance()->SetTestingFactory(
         profile(), NULL);
   }