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

chrome/browser/sessions/session_tab_helper.h

Index: chrome/browser/sessions/session_tab_helper.h
diff --git a/chrome/browser/sessions/session_tab_helper.h b/chrome/browser/sessions/session_tab_helper.h
index 7fb44eb43979ad4fb62b1e8fffb6db0d25ce7ac8..b6c57582d4bf82433814abbbbeba7119d99a9457 100644
--- a/chrome/browser/sessions/session_tab_helper.h
+++ b/chrome/browser/sessions/session_tab_helper.h
@@ -45,9 +45,9 @@ class SessionTabHelper : public content::WebContentsObserver,
   // content::WebContentsObserver:
 #if defined(ENABLE_EXTENSIONS)
   virtual void RenderViewCreated(
-      content::RenderViewHost* render_view_host) OVERRIDE;
+      content::RenderViewHost* render_view_host) override;
 #endif
-  virtual void UserAgentOverrideSet(const std::string& user_agent) OVERRIDE;
+  virtual void UserAgentOverrideSet(const std::string& user_agent) override;
 
  private:
   explicit SessionTabHelper(content::WebContents* contents);