Add a WebDocument::watchCssSelectors(selectors)

Source/web/WebDocument.cpp

Index: Source/web/WebDocument.cpp
diff --git a/Source/web/WebDocument.cpp b/Source/web/WebDocument.cpp
index a6d93df59cf3ae75670ca20c5ae805281975d201..6fe8c68976309d7031558396409c2457cd2a936d 100644
--- a/Source/web/WebDocument.cpp
+++ b/Source/web/WebDocument.cpp
@@ -48,6 +48,7 @@
 #include "core/accessibility/AXObjectCache.h"
 #include "core/css/CSSParserMode.h"
 #include "core/css/StyleSheetContents.h"
+#include "core/dom/CSSSelectorWatch.h"
 #include "core/dom/Document.h"
 #include "core/dom/DocumentType.h"
 #include "core/dom/Element.h"
@@ -213,6 +214,14 @@ void WebDocument::insertUserStyleSheet(const WebString& sourceCode, UserStyleLev
         document->styleSheetCollections()->addAuthorSheet(parsedSheet);
 }
 
+void WebDocument::watchCSSSelectors(const WebVector<WebString>& webSelectors)
+{
+    RefPtr<Document> document = unwrap<Document>();
+    Vector<String> selectors;
+    selectors.append(webSelectors.data(), webSelectors.size());
+    CSSSelectorWatch::from(document.get())->watchCSSSelectors(selectors);
+}
+
 void WebDocument::cancelFullScreen()
 {
     if (FullscreenElementStack* fullscreen = FullscreenElementStack::fromIfExists(unwrap<Document>()))