Add the referrer policy to the page state

content/common/page_state_serialization.cc

Index: content/common/page_state_serialization.cc
diff --git a/content/common/page_state_serialization.cc b/content/common/page_state_serialization.cc
index 1a7db619442e43bf3b91fd1c78817a18621004e8..9e5715015748e4677bfbbeac96f0a41c47b39949 100644
--- a/content/common/page_state_serialization.cc
+++ b/content/common/page_state_serialization.cc
@@ -188,12 +188,13 @@ struct SerializeObject {
 // 15: Removes a bunch of values we defined but never used.
 // 16: Switched from blob urls to blob uuids.
 // 17: Add a target frame id number.
+// 18: Add referrer policy.
 //
 // NOTE: If the version is -1, then the pickle contains only a URL string.
 // See ReadPageState.
 //
 const int kMinVersion = 11;
-const int kCurrentVersion = 17;
+const int kCurrentVersion = 18;
 
 // A bunch of convenience functions to read/write to SerializeObjects.  The
 // de-serializers assume the input data will be in the correct format and fall
@@ -504,6 +505,7 @@ void WriteFrameState(
   WriteInteger64(state.item_sequence_number, obj);
   WriteInteger64(state.document_sequence_number, obj);
   WriteInteger64(state.target_frame_id, obj);
+  WriteInteger(state.referrer_policy, obj);
 
   bool has_state_object = !state.state_object.is_null();
   WriteBoolean(has_state_object, obj);
@@ -556,6 +558,10 @@ void ReadFrameState(SerializeObject* obj, bool is_top,
   state->document_sequence_number = ReadInteger64(obj);
   if (obj->version >= 17)
     state->target_frame_id = ReadInteger64(obj);
+  if (obj->version >= 18) {
+    state->referrer_policy =
+        static_cast<blink::WebReferrerPolicy>(ReadInteger(obj));
+  }
 
   bool has_state_object = ReadBoolean(obj);
   if (has_state_object)
@@ -666,7 +672,8 @@ ExplodedFrameState::ExplodedFrameState()
     : item_sequence_number(0),
       document_sequence_number(0),
       target_frame_id(0),
-      page_scale_factor(0.0) {
+      page_scale_factor(0.0),
+      referrer_policy(blink::WebReferrerPolicyDefault) {
 }
 
 ExplodedFrameState::~ExplodedFrameState() {