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

chrome/browser/search/most_visited_iframe_source.h

Index: chrome/browser/search/most_visited_iframe_source.h
diff --git a/chrome/browser/search/most_visited_iframe_source.h b/chrome/browser/search/most_visited_iframe_source.h
index 63b7e4d737d484bc788fbf67755f9c609ba4d899..f48445d46f6070dc242e955b7ecf2add4ba47143 100644
--- a/chrome/browser/search/most_visited_iframe_source.h
+++ b/chrome/browser/search/most_visited_iframe_source.h
@@ -27,13 +27,13 @@ class MostVisitedIframeSource : public IframeSource {
       const std::string& path_and_query,
       int render_process_id,
       int render_frame_id,
-      const content::URLDataSource::GotDataCallback& callback) OVERRIDE;
+      const content::URLDataSource::GotDataCallback& callback) override;
 
  protected:
   // Overridden from IframeSource:
-  virtual std::string GetSource() const OVERRIDE;
+  virtual std::string GetSource() const override;
 
-  virtual bool ServesPath(const std::string& path) const OVERRIDE;
+  virtual bool ServesPath(const std::string& path) const override;
 
  private:
   FRIEND_TEST_ALL_PREFIXES(MostVisitedIframeSourceTest,