Standardize usage of virtual/override/final in chrome/

chrome/common/extensions/permissions/chrome_api_permissions.h

Index: chrome/common/extensions/permissions/chrome_api_permissions.h
diff --git a/chrome/common/extensions/permissions/chrome_api_permissions.h b/chrome/common/extensions/permissions/chrome_api_permissions.h
index aef5eb72dc9d953c46fe0b72ecc96eee9a2069e6..29890bd9f4d8d531c4d01cf9a4116d5d70e95ab8 100644
--- a/chrome/common/extensions/permissions/chrome_api_permissions.h
+++ b/chrome/common/extensions/permissions/chrome_api_permissions.h
@@ -15,9 +15,8 @@ namespace extensions {
 // Registers the permissions used in Chrome with the PermissionsInfo global.
 class ChromeAPIPermissions : public PermissionsProvider {
  public:
-  virtual std::vector<APIPermissionInfo*> GetAllPermissions() const override;
-  virtual std::vector<PermissionsProvider::AliasInfo> GetAllAliases() const
-      override;
+  std::vector<APIPermissionInfo*> GetAllPermissions() const override;
+  std::vector<PermissionsProvider::AliasInfo> GetAllAliases() const override;
 };
 
 }  // namespace extensions