Add the referrer policy to the page state

content/common/page_state_serialization.h

Index: content/common/page_state_serialization.h
diff --git a/content/common/page_state_serialization.h b/content/common/page_state_serialization.h
index da64295fe1e01d16f1e0237ae4aa66fa40d008f0..1a4ddc859e6e362850876f0a11a279f5eecc12d4 100644
--- a/content/common/page_state_serialization.h
+++ b/content/common/page_state_serialization.h
@@ -10,6 +10,7 @@
 #include "base/strings/nullable_string16.h"
 #include "content/common/content_export.h"
 #include "third_party/WebKit/public/platform/WebHTTPBody.h"
+#include "third_party/WebKit/public/platform/WebReferrerPolicy.h"
 #include "ui/gfx/point.h"
 #include "url/gurl.h"
 
@@ -52,6 +53,7 @@ struct CONTENT_EXPORT ExplodedFrameState {
   int64 document_sequence_number;
   int64 target_frame_id;
   double page_scale_factor;
+  blink::WebReferrerPolicy referrer_policy;
   ExplodedHttpBody http_body;
   std::vector<ExplodedFrameState> children;