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

chrome/browser/search/iframe_source.h

Index: chrome/browser/search/iframe_source.h
diff --git a/chrome/browser/search/iframe_source.h b/chrome/browser/search/iframe_source.h
index 5e8f2d870ecbbf5b4eb6270c5ab8469aa338acda..c1a9348e7fa78babc2c3b1ef6eb9ba5b48ef5a41 100644
--- a/chrome/browser/search/iframe_source.h
+++ b/chrome/browser/search/iframe_source.h
@@ -18,10 +18,10 @@ class IframeSource : public content::URLDataSource {
  protected:
   // Overridden from content::URLDataSource:
   virtual std::string GetMimeType(
-      const std::string& path_and_query) const OVERRIDE;
-  virtual bool ShouldDenyXFrameOptions() const OVERRIDE;
+      const std::string& path_and_query) const override;
+  virtual bool ShouldDenyXFrameOptions() const override;
   virtual bool ShouldServiceRequest(
-      const net::URLRequest* request) const OVERRIDE;
+      const net::URLRequest* request) const override;
 
   // Returns whether this source should serve data for a particular path.
   virtual bool ServesPath(const std::string& path) const = 0;