WebURLRequest: Track the requesting document's URL through navigations.

Source/platform/exported/WebURLRequest.cpp

Index: Source/platform/exported/WebURLRequest.cpp
diff --git a/Source/platform/exported/WebURLRequest.cpp b/Source/platform/exported/WebURLRequest.cpp
index dfe231dc0ed30f7a2ea8ac1e5a93f3b15458be55..68ad34d8b91a1840f1261f9eb67a6bbaad088ab7 100644
--- a/Source/platform/exported/WebURLRequest.cpp
+++ b/Source/platform/exported/WebURLRequest.cpp
@@ -124,6 +124,16 @@ void WebURLRequest::setFirstPartyForCookies(const WebURL& firstPartyForCookies)
     m_private->m_resourceRequest->setFirstPartyForCookies(firstPartyForCookies);
 }
 
+WebURL WebURLRequest::requestorURL() const
+{
+    return m_private->m_resourceRequest->requestorURL();
+}
+
+void WebURLRequest::setRequestorURL(const WebURL& requestorURL)
+{
+    m_private->m_resourceRequest->setRequestorURL(requestorURL);
+}
+
 bool WebURLRequest::allowStoredCredentials() const
 {
     return m_private->m_resourceRequest->allowStoredCredentials();