Make generateReferrerHeader() return a Referrer instead of a String

Source/core/loader/FrameLoader.cpp

Index: Source/core/loader/FrameLoader.cpp
diff --git a/Source/core/loader/FrameLoader.cpp b/Source/core/loader/FrameLoader.cpp
index e522d7bef1b95c5c8e87a51a35ec07a1b3817f9d..9100b0d077589615b071fdb88496b68b83d3ec9c 100644
--- a/Source/core/loader/FrameLoader.cpp
+++ b/Source/core/loader/FrameLoader.cpp
@@ -632,10 +632,10 @@ void FrameLoader::setReferrerForFrameRequest(ResourceRequest& request, ShouldSen
     // Always use the initiating document to generate the referrer.
     // We need to generateReferrerHeader(), because we haven't enforced ReferrerPolicy or https->http
     // referrer suppression yet.
-    String referrer = SecurityPolicy::generateReferrerHeader(originDocument->referrerPolicy(), request.url(), originDocument->outgoingReferrer());
+    Referrer referrer = SecurityPolicy::generateReferrerHeader(originDocument->referrerPolicy(), request.url(), originDocument->outgoingReferrer());
 
-    request.setHTTPReferrer(Referrer(referrer, originDocument->referrerPolicy()));
-    RefPtr<SecurityOrigin> referrerOrigin = SecurityOrigin::createFromString(referrer);
+    request.setHTTPReferrer(referrer);
+    RefPtr<SecurityOrigin> referrerOrigin = SecurityOrigin::createFromString(referrer.referrer);
     request.addHTTPOriginIfNeeded(referrerOrigin->toAtomicString());
 }