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

chrome/browser/thumbnails/thumbnail_list_source.h

Index: chrome/browser/thumbnails/thumbnail_list_source.h
diff --git a/chrome/browser/thumbnails/thumbnail_list_source.h b/chrome/browser/thumbnails/thumbnail_list_source.h
index fef25ddd469b75990d89bb6db8a9e7673e49036e..bff42287d80ac959e870c196c0dcf20256a3ee81 100644
--- a/chrome/browser/thumbnails/thumbnail_list_source.h
+++ b/chrome/browser/thumbnails/thumbnail_list_source.h
@@ -32,18 +32,18 @@ class ThumbnailListSource : public content::URLDataSource {
   explicit ThumbnailListSource(Profile* profile);
 
   // content::URLDataSource implementation.
-  virtual std::string GetSource() const OVERRIDE;
+  virtual std::string GetSource() const override;
   virtual void StartDataRequest(
       const std::string& path,
       int render_process_id,
       int render_frame_id,
-      const content::URLDataSource::GotDataCallback& callback) OVERRIDE;
-  virtual std::string GetMimeType(const std::string& path) const OVERRIDE;
+      const content::URLDataSource::GotDataCallback& callback) override;
+  virtual std::string GetMimeType(const std::string& path) const override;
   virtual base::MessageLoop* MessageLoopForRequestPath(
-      const std::string& path) const OVERRIDE;
+      const std::string& path) const override;
   virtual bool ShouldServiceRequest(
-      const net::URLRequest* request) const OVERRIDE;
-  virtual bool ShouldReplaceExistingSource() const OVERRIDE;
+      const net::URLRequest* request) const override;
+  virtual bool ShouldReplaceExistingSource() const override;
 
  private:
   virtual ~ThumbnailListSource();