Introducing the WebServiceWorkerCache.

public/platform/WebServiceWorkerRequest.h

Index: public/platform/WebServiceWorkerRequest.h
diff --git a/public/platform/WebServiceWorkerRequest.h b/public/platform/WebServiceWorkerRequest.h
index 8c0b219b24a2c8b18478107029da1e338948e6b6..5a8d0f89ed59fa67389b9dc93e5de7224b182f67 100644
--- a/public/platform/WebServiceWorkerRequest.h
+++ b/public/platform/WebServiceWorkerRequest.h
@@ -22,6 +22,7 @@
 namespace blink {
 
 class BlobDataHandle;
+class WebHTTPHeaderVisitor;
 class WebServiceWorkerRequestPrivate;
 
 // Represents a request of a fetch operation. FetchEvent dispatched by the
@@ -31,6 +32,7 @@ class BLINK_PLATFORM_EXPORT WebServiceWorkerRequest {
 public:
     ~WebServiceWorkerRequest() { reset(); }
     WebServiceWorkerRequest();
+    WebServiceWorkerRequest(const WebServiceWorkerRequest& other) { assign(other); }
     WebServiceWorkerRequest& operator=(const WebServiceWorkerRequest& other)
     {
         assign(other);
@@ -47,10 +49,12 @@ public:
     WebString method() const;
 
     void setHeader(const WebString& key, const WebString& value);
+    void visitHTTPHeaderFields(WebHTTPHeaderVisitor*) const;
 
     void setBlob(const WebString& uuid, long long size);
 
     void setReferrer(const WebString&, WebReferrerPolicy);
+    WebURL referrerUrl() const;
 
     void setIsReload(bool);
     bool isReload() const;