[rac] Use stale libaddressinput data if download fails

third_party/libaddressinput/chromium/cpp/src/retriever.h

Index: third_party/libaddressinput/chromium/cpp/src/retriever.h
diff --git a/third_party/libaddressinput/chromium/cpp/src/retriever.h b/third_party/libaddressinput/chromium/cpp/src/retriever.h
index d30a76b5cf1c6dc104b335c41245720a21f4972b..4413f05f5979c5172ea9704020ff2d3f534bd38e 100644
--- a/third_party/libaddressinput/chromium/cpp/src/retriever.h
+++ b/third_party/libaddressinput/chromium/cpp/src/retriever.h
@@ -80,16 +80,23 @@ class Retriever {
   // to the constructor.
   bool IsValidationDataUrl(const std::string& url) const;
 
-  // Looks up the callback for |key| in |requests_|, removes it from the map
-  // and returns it. Assumes that |key| is in fact in |requests_|.
-  scoped_ptr<Callback> GetCallbackForKey(const std::string& key);
+  // Looks up the callback for |key| in |requests_|, removes it from the map and
+  // invokes it with |key|, |success|, and |data| parameters.
+  void InvokeCallbackForKey(const std::string& key,
+                            bool success,
+                            const std::string& data);
 
   const std::string validation_data_url_;
   scoped_ptr<Downloader> downloader_;
   scoped_ptr<Storage> storage_;
+
   // Holds pending requests. The callback pointers are owned.
   std::map<std::string, Callback*> requests_;
 
+  // Holds data from storage that has expired timestamps. If a download fails,
+  // then this data is used as fallback.
+  std::map<std::string, std::string> stale_data_;
+
   DISALLOW_COPY_AND_ASSIGN(Retriever);
 };