Introduce WebCachePolicy to merge cache policy enums

third_party/WebKit/public/web/WebFrame.h

Index: third_party/WebKit/public/web/WebFrame.h
diff --git a/third_party/WebKit/public/web/WebFrame.h b/third_party/WebKit/public/web/WebFrame.h
index 139ceeadc6750e646afe6af357325dfa97d55533..0fb1cb092bda4b4f65017a8231ea552c16267d0f 100644
--- a/third_party/WebKit/public/web/WebFrame.h
+++ b/third_party/WebKit/public/web/WebFrame.h
@@ -36,6 +36,7 @@
 #include "WebIconURL.h"
 #include "WebNode.h"
 #include "WebURLLoaderOptions.h"
+#include "public/platform/WebCachePolicy.h"
 #include "public/platform/WebCanvas.h"
 #include "public/platform/WebMessagePortChannel.h"
 #include "public/platform/WebPrivateOwnPtr.h"
@@ -353,7 +354,8 @@ public:
     virtual void loadHistoryItem(
         const WebHistoryItem&,
         WebHistoryLoadType,
-        WebURLRequest::CachePolicy = WebURLRequest::UseProtocolCachePolicy) = 0;
+        WebCachePolicy = WebCachePolicy::UseProtocolCachePolicy)
+        = 0;
 
     // This method is short-hand for calling LoadData, where mime_type is
     // "text/html" and text_encoding is "UTF-8".