Standardize usage of virtual/override/final in chrome/

chrome/common/extensions/permissions/chrome_permission_message_provider.h

Index: chrome/common/extensions/permissions/chrome_permission_message_provider.h
diff --git a/chrome/common/extensions/permissions/chrome_permission_message_provider.h b/chrome/common/extensions/permissions/chrome_permission_message_provider.h
index d52150a5bf8fb4d28b61e123dba3b1393ea6d4eb..6638fb550248f0b26da1621cf0f91eb111a6e81b 100644
--- a/chrome/common/extensions/permissions/chrome_permission_message_provider.h
+++ b/chrome/common/extensions/permissions/chrome_permission_message_provider.h
@@ -23,22 +23,21 @@ namespace extensions {
 class ChromePermissionMessageProvider : public PermissionMessageProvider {
  public:
   ChromePermissionMessageProvider();
-  virtual ~ChromePermissionMessageProvider();
+  ~ChromePermissionMessageProvider() override;
 
   // PermissionMessageProvider implementation.
-  virtual PermissionMessages GetPermissionMessages(
+  PermissionMessages GetPermissionMessages(
       const PermissionSet* permissions,
       Manifest::Type extension_type) const override;
-  virtual std::vector<base::string16> GetWarningMessages(
+  std::vector<base::string16> GetWarningMessages(
       const PermissionSet* permissions,
       Manifest::Type extension_type) const override;
-  virtual std::vector<base::string16> GetWarningMessagesDetails(
+  std::vector<base::string16> GetWarningMessagesDetails(
       const PermissionSet* permissions,
       Manifest::Type extension_type) const override;
-  virtual bool IsPrivilegeIncrease(
-      const PermissionSet* old_permissions,
-      const PermissionSet* new_permissions,
-      Manifest::Type extension_type) const override;
+  bool IsPrivilegeIncrease(const PermissionSet* old_permissions,
+                           const PermissionSet* new_permissions,
+                           Manifest::Type extension_type) const override;
 
  private:
   // Gets the permission messages for the API permissions.