Preload scan external CSS for @import

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 8d60d563f7308ff84ddfa18af0240389737c12d8..e4db7d5b3fa25d5ea109f9eb070b39fa48eb4b29 100644
--- a/third_party/WebKit/public/platform/WebLoadingBehaviorFlag.h
+++ b/third_party/WebKit/public/platform/WebLoadingBehaviorFlag.h
@@ -24,6 +24,9 @@ enum WebLoadingBehaviorFlag {
     // Indicates that the page is a reload and has a synchronous, cross-origin document.written
     // script.
     WebLoadingBehaviorDocumentWriteBlockReload = 1 << 3,
+    // The page loaded external CSS that generated a PreloadRequest via the
+    // CSSPreloaderResourceClient.
+    WebLoadingBehaviorCSSPreloadFound = 1 << 4,
 };
 
 } // namespace blink