Track original URL when downloading a redirected page

components/offline_pages/core/background/save_page_request.cc

Index: components/offline_pages/core/background/save_page_request.cc
diff --git a/components/offline_pages/core/background/save_page_request.cc b/components/offline_pages/core/background/save_page_request.cc
index 02019dec5238914ed3bc00383b5476d2a2ab109b..9b19dc4d429cad74f36178d480e7796d62e8cc37 100644
--- a/components/offline_pages/core/background/save_page_request.cc
+++ b/components/offline_pages/core/background/save_page_request.cc
@@ -47,7 +47,8 @@ SavePageRequest::SavePageRequest(const SavePageRequest& other)
       completed_attempt_count_(other.completed_attempt_count_),
       last_attempt_time_(other.last_attempt_time_),
       user_requested_(other.user_requested_),
-      state_(other.state_) {}
+      state_(other.state_),
+      original_url_(other.original_url_) {}
 
 SavePageRequest::~SavePageRequest() {}
 
@@ -59,7 +60,7 @@ bool SavePageRequest::operator==(const SavePageRequest& other) const {
          started_attempt_count_ == other.started_attempt_count_ &&
          completed_attempt_count_ == other.completed_attempt_count_ &&
          last_attempt_time_ == other.last_attempt_time_ &&
-         state_ == other.state_;
+         state_ == other.state_ && original_url_ == other.original_url_;
 }
 
 void SavePageRequest::MarkAttemptStarted(const base::Time& start_time) {