Make reading list entry movable only

ios/chrome/browser/reading_list/reading_list_entry.cc

Index: ios/chrome/browser/reading_list/reading_list_entry.cc
diff --git a/ios/chrome/browser/reading_list/reading_list_entry.cc b/ios/chrome/browser/reading_list/reading_list_entry.cc
index 62fa14300bc4f9b724d7bb7152295b44d6878eb9..987c5e32be7241d2486b9a5f857f5d039dbfb400 100644
--- a/ios/chrome/browser/reading_list/reading_list_entry.cc
+++ b/ios/chrome/browser/reading_list/reading_list_entry.cc
@@ -9,7 +9,7 @@ ReadingListEntry::ReadingListEntry(const GURL& url, const std::string& title)
   DCHECK(!url.is_empty());
   DCHECK(url.is_valid());
 }
-ReadingListEntry::ReadingListEntry(const ReadingListEntry& entry)
+ReadingListEntry::ReadingListEntry(ReadingListEntry&& entry)
     : url_(entry.URL()),
       title_(entry.Title()),
       distilled_url_(entry.DistilledURL()),
@@ -32,7 +32,7 @@ const GURL& ReadingListEntry::DistilledURL() const {
   return distilled_url_;
 }
 
-ReadingListEntry& ReadingListEntry::operator=(const ReadingListEntry& other) {
+ReadingListEntry& ReadingListEntry::operator=(ReadingListEntry&& other) {
   url_ = other.url_;
   title_ = other.title_;
   distilled_url_ = other.distilled_url_;