Defer late and async scripts

Source/core/fetch/FetchRequest.h

Index: Source/core/fetch/FetchRequest.h
diff --git a/Source/core/fetch/FetchRequest.h b/Source/core/fetch/FetchRequest.h
index 7117fc92e04adb0b012573071d77bb7cb843d685..99ec0c7923c3dad9d876e5ef419fcec35b541330 100644
--- a/Source/core/fetch/FetchRequest.h
+++ b/Source/core/fetch/FetchRequest.h
@@ -56,6 +56,10 @@ public:
     ResourceLoadPriority priority() const { return m_priority; }
     bool forPreload() const { return m_forPreload; }
     void setForPreload(bool forPreload) { m_forPreload = forPreload; }
+    bool isBeforeBody() const { return m_isBeforeBody; }
+    void setIsBeforeBody(bool isBeforeBody) { m_isBeforeBody = isBeforeBody; }
+    bool execAsync() const { return m_execAsync; }
+    void setExecAsync(bool execAsync) { m_execAsync = execAsync; }
     DeferOption defer() const { return m_defer; }
     void setDefer(DeferOption defer) { m_defer = defer; }
     void setContentSecurityCheck(ContentSecurityPolicyCheck contentSecurityPolicyOption) { m_options.contentSecurityPolicyOption = contentSecurityPolicyOption; }
@@ -71,6 +75,8 @@ private:
     ResourceLoaderOptions m_options;
     ResourceLoadPriority m_priority;
     bool m_forPreload;
+    bool m_isBeforeBody;
+    bool m_execAsync;
     DeferOption m_defer;
     OriginRestriction m_originRestriction;
 };