Metrics for document.write script blocking

third_party/WebKit/public/platform/WebLoadingBehaviorFlag.h

Index: third_party/WebKit/public/platform/WebLoadingBehaviorFlag.h
diff --git a/third_party/WebKit/public/platform/WebLoadingBehaviorFlag.h b/third_party/WebKit/public/platform/WebLoadingBehaviorFlag.h
index be051af21fbc8232b81849372ecca32f638c278b..c6e828810c55bbcd59bddd3a97ec33cdef68c570 100644
--- a/third_party/WebKit/public/platform/WebLoadingBehaviorFlag.h
+++ b/third_party/WebKit/public/platform/WebLoadingBehaviorFlag.h
@@ -18,6 +18,14 @@ enum WebLoadingBehaviorFlag {
     WebLoadingBehaviorDocumentWriteEvaluator = 1 << 0,
     // Indicates that the page is controlled by a Service Worker.
     WebLoadingBehaviorServiceWorkerControlled = 1 << 1,
+    // Indicates that the page has a synchronous, cross-origin document.written
+    // script.
+    WebLoadingBehaviorDocumentWriteBlock = 1 << 2,
+    // Indicates that the page is a reload and has a synchronous, cross-origin document.written
+    // script.
+    WebLoadingBehaviorDocumentWriteBlockReload = 1 << 3,
+    // Note: When adding a new value, also add the value to the test: DocumentWritePageLoadMetricsObserverTest.ValidFeatureFlags
+    // to check its validity.
 };
 
 } // namespace blink