Introduce WebCachePolicy to merge cache policy enums

chrome/renderer/net/net_error_helper.cc

Index: chrome/renderer/net/net_error_helper.cc
diff --git a/chrome/renderer/net/net_error_helper.cc b/chrome/renderer/net/net_error_helper.cc
index a1b85b78437e5a97b4e9d97e1a2a1a271b683174..070c823ad7df466aa0bb4027a20fe51e2b250184 100644
--- a/chrome/renderer/net/net_error_helper.cc
+++ b/chrome/renderer/net/net_error_helper.cc
@@ -315,7 +315,7 @@ void NetErrorHelper::LoadPageFromCache(const GURL& page_url) {
       "POST"));
 
   blink::WebURLRequest request(page_url);
-  request.setCachePolicy(blink::WebURLRequest::ReturnCacheDataDontLoad);
+  request.setCachePolicy(blink::WebCachePolicy::ReturnCacheDataDontLoad);
 
   web_frame->loadRequest(request);
 }