replace OVERRIDE and FINAL with override and final in chrome/browser/extensions/

chrome/browser/extensions/extension_system_impl.cc

Index: chrome/browser/extensions/extension_system_impl.cc
diff --git a/chrome/browser/extensions/extension_system_impl.cc b/chrome/browser/extensions/extension_system_impl.cc
index ca34198e22e7fbb3262b8e64f6806896eb73c107..e05bc6f56e0b7663aa22c091bfadd7624a6d95ff 100644
--- a/chrome/browser/extensions/extension_system_impl.cc
+++ b/chrome/browser/extensions/extension_system_impl.cc
@@ -161,7 +161,7 @@ class ContentVerifierDelegateImpl : public ContentVerifierDelegate {
 
   virtual ~ContentVerifierDelegateImpl() {}
 
-  virtual Mode ShouldBeVerified(const Extension& extension) OVERRIDE {
+  virtual Mode ShouldBeVerified(const Extension& extension) override {
 #if defined(OS_CHROMEOS)
     if (ExtensionAssetsManagerChromeOS::IsSharedInstall(&extension))
       return ContentVerifierDelegate::ENFORCE_STRICT;
@@ -184,7 +184,7 @@ class ContentVerifierDelegateImpl : public ContentVerifierDelegate {
     return default_mode_;
   }
 
-  virtual const ContentVerifierKey& PublicKey() OVERRIDE {
+  virtual const ContentVerifierKey& PublicKey() override {
     static ContentVerifierKey key(
         extension_misc::kWebstoreSignaturesPublicKey,
         extension_misc::kWebstoreSignaturesPublicKeySize);
@@ -192,7 +192,7 @@ class ContentVerifierDelegateImpl : public ContentVerifierDelegate {
   }
 
   virtual GURL GetSignatureFetchUrl(const std::string& extension_id,
-                                    const base::Version& version) OVERRIDE {
+                                    const base::Version& version) override {
     // TODO(asargent) Factor out common code from the extension updater's
     // ManifestFetchData class that can be shared for use here.
     std::vector<std::string> parts;
@@ -211,11 +211,11 @@ class ContentVerifierDelegateImpl : public ContentVerifierDelegate {
   }
 
   virtual std::set<base::FilePath> GetBrowserImagePaths(
-      const extensions::Extension* extension) OVERRIDE {
+      const extensions::Extension* extension) override {
     return extension_file_util::GetBrowserImagePaths(extension);
   }
 
-  virtual void VerifyFailed(const std::string& extension_id) OVERRIDE {
+  virtual void VerifyFailed(const std::string& extension_id) override {
     if (!service_)
       return;
     ExtensionRegistry* registry = ExtensionRegistry::Get(service_->profile());