Implement RevokePermission() method in PermissionService.

content/browser/permissions/permission_service_impl.h

Index: content/browser/permissions/permission_service_impl.h
diff --git a/content/browser/permissions/permission_service_impl.h b/content/browser/permissions/permission_service_impl.h
index d9faa41bc1e8904f665fd05839d76470b01bd6ad..afbb8d76f34d33e9de70d48d94db5287bcdc7ed7 100644
--- a/content/browser/permissions/permission_service_impl.h
+++ b/content/browser/permissions/permission_service_impl.h
@@ -52,6 +52,10 @@ class PermissionServiceImpl : public mojo::InterfaceImpl<PermissionService> {
       const mojo::String& origin,
       bool user_gesture,
       const mojo::Callback<void(PermissionStatus)>& callback) override;
+  void RevokePermission(
+      PermissionName permission,
+      const mojo::String& origin,
+      const mojo::Callback<void(PermissionStatus)>& callback) override;
 
   // mojo::InterfaceImpl.
   void OnConnectionError() override;
@@ -61,6 +65,9 @@ class PermissionServiceImpl : public mojo::InterfaceImpl<PermissionService> {
     int request_id,
     bool allowed);
 
+  PermissionStatus GetPermissionStatus(PermissionType type, GURL origin);
+  void ResetPermissionStatus(PermissionType type, GURL origin);
+
   RequestsMap pending_requests_;
   // context_ owns |this|.
   PermissionServiceContext* context_;