replace OVERRIDE and FINAL with override and final in chrome/browser/[r-z]*

chrome/browser/thumbnails/thumbnail_tab_helper.h

Index: chrome/browser/thumbnails/thumbnail_tab_helper.h
diff --git a/chrome/browser/thumbnails/thumbnail_tab_helper.h b/chrome/browser/thumbnails/thumbnail_tab_helper.h
index 5fa7b0a9d45c703d2076678f81908e0e283ac2c9..232643ddf890c8659d147f78eee0a4bc8bf83fe0 100644
--- a/chrome/browser/thumbnails/thumbnail_tab_helper.h
+++ b/chrome/browser/thumbnails/thumbnail_tab_helper.h
@@ -36,14 +36,14 @@ class ThumbnailTabHelper
   // content::NotificationObserver overrides.
   virtual void Observe(int type,
                        const content::NotificationSource& source,
-                       const content::NotificationDetails& details) OVERRIDE;
+                       const content::NotificationDetails& details) override;
 
   // content::WebContentsObserver overrides.
   virtual void RenderViewDeleted(
-      content::RenderViewHost* render_view_host) OVERRIDE;
+      content::RenderViewHost* render_view_host) override;
   virtual void DidStartLoading(
-      content::RenderViewHost* render_view_host) OVERRIDE;
-  virtual void NavigationStopped() OVERRIDE;
+      content::RenderViewHost* render_view_host) override;
+  virtual void NavigationStopped() override;
 
   // Update the thumbnail of the given tab contents if necessary.
   void UpdateThumbnailIfNecessary(content::WebContents* web_contents);