Error pages: Break retain cycle NativeContent/StaticHTMLViewController

ios/chrome/browser/ui/static_content/static_html_view_controller.h

Index: ios/chrome/browser/ui/static_content/static_html_view_controller.h
diff --git a/ios/chrome/browser/ui/static_content/static_html_view_controller.h b/ios/chrome/browser/ui/static_content/static_html_view_controller.h
index e1f9b186f55a01146b17ce646c28a5e2dace40fc..070e246ea3df9a79ad2fbb8ae70d97810ec44cd5 100644
--- a/ios/chrome/browser/ui/static_content/static_html_view_controller.h
+++ b/ios/chrome/browser/ui/static_content/static_html_view_controller.h
@@ -64,6 +64,7 @@ typedef void (^HtmlCallback)(NSString*);
 // Initialization method. |generator| will produce the html to display. Its
 // generation method will be called each time reload is called. |browserState|
 // is the user browser state to use for loading resources and must not be null.
+// |StaticHtmlViewController| retains |generator|.
 - (instancetype)initWithGenerator:(id<HtmlGenerator>)generator
                      browserState:(web::BrowserState*)browserState;