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

chrome/browser/download/download_history.h

Index: chrome/browser/download/download_history.h
diff --git a/chrome/browser/download/download_history.h b/chrome/browser/download/download_history.h
index ea51ab4c43af2c7b9e3f1589d5e91aad3cbb8106..64479c7277c2725d3ed2ed8ca90c958728f83cdf 100644
--- a/chrome/browser/download/download_history.h
+++ b/chrome/browser/download/download_history.h
@@ -110,13 +110,13 @@ class DownloadHistory : public AllDownloadItemNotifier::Observer {
 
   // AllDownloadItemNotifier::Observer
   virtual void OnDownloadCreated(
-      content::DownloadManager* manager, content::DownloadItem* item) OVERRIDE;
+      content::DownloadManager* manager, content::DownloadItem* item) override;
   virtual void OnDownloadUpdated(
-      content::DownloadManager* manager, content::DownloadItem* item) OVERRIDE;
+      content::DownloadManager* manager, content::DownloadItem* item) override;
   virtual void OnDownloadOpened(
-      content::DownloadManager* manager, content::DownloadItem* item) OVERRIDE;
+      content::DownloadManager* manager, content::DownloadItem* item) override;
   virtual void OnDownloadRemoved(
-      content::DownloadManager* manager, content::DownloadItem* item) OVERRIDE;
+      content::DownloadManager* manager, content::DownloadItem* item) override;
 
   // Schedule a record to be removed from |history_| the next time
   // RemoveDownloadsBatch() runs. Schedule RemoveDownloadsBatch() to be run soon