Add a WebDocument::watchCssSelectors(selectors)

Source/web/FrameLoaderClientImpl.cpp

Index: Source/web/FrameLoaderClientImpl.cpp
diff --git a/Source/web/FrameLoaderClientImpl.cpp b/Source/web/FrameLoaderClientImpl.cpp
index 7a5f0c8ad5a5d5cd0431ad637eafc12a40cfc7b4..b9897397e65f8be92b533917dd198423bc56bd28 100644
--- a/Source/web/FrameLoaderClientImpl.cpp
+++ b/Source/web/FrameLoaderClientImpl.cpp
@@ -592,6 +592,13 @@ void FrameLoaderClientImpl::didDispatchPingLoader(const KURL& url)
         m_webFrame->client()->didDispatchPingLoader(m_webFrame, url);
 }
 
+void FrameLoaderClientImpl::selectorMatchChanged(const Vector<String>& addedSelectors, const Vector<String>& removedSelectors)
+{
+    if (m_webFrame->client()) {
+        m_webFrame->client()->didMatchCSS(m_webFrame, WebVector<WebString>(addedSelectors), WebVector<WebString>(removedSelectors));
+    }
+}
+
 ResourceError FrameLoaderClientImpl::interruptedForPolicyChangeError(
     const ResourceRequest& request)
 {