[Proof-of-concept] PlzNavigate and Service Worker

content/child/request_extra_data.h

Index: content/child/request_extra_data.h
diff --git a/content/child/request_extra_data.h b/content/child/request_extra_data.h
index 614d9fc321cb528f0584ed885d0726cddd39f708..23b789ad03eefc24cb60a8dbede06226263dca09 100644
--- a/content/child/request_extra_data.h
+++ b/content/child/request_extra_data.h
@@ -114,6 +114,12 @@ class CONTENT_EXPORT RequestExtraData
     stream_override_ = stream_override.Pass();
   }
 
+  // PlzNavigate:
+  int navigation_provider_id() const { return navigation_provider_id_; }
+  void set_navigation_provider_id(int navigation_provider_id) {
+    navigation_provider_id_ = navigation_provider_id;
+  }
+
  private:
   blink::WebPageVisibilityState visibility_state_;
   int render_frame_id_;
@@ -130,6 +136,7 @@ class CONTENT_EXPORT RequestExtraData
   blink::WebString custom_user_agent_;
   blink::WebString requested_with_;
   scoped_ptr<StreamOverrideParameters> stream_override_;
+  int navigation_provider_id_;
 
   DISALLOW_COPY_AND_ASSIGN(RequestExtraData);
 };