libaddressinput: Add fallback data for US address validation.

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 4749ee5146fad6c5bb805f9dfdeaa006451e26ae..517f972c83c508344c38a54bef110d07021b9bbe 100644
--- a/third_party/libaddressinput/chromium/cpp/src/retriever.h
+++ b/third_party/libaddressinput/chromium/cpp/src/retriever.h
@@ -32,7 +32,7 @@ namespace addressinput {
 class Downloader;
 class Storage;
 
-// Retrieves data. Sample usage:
+// Manages downloading data and caching it locally. Sample usage:
 //    Storage* storage = ...;
 //    Downloader* downloader = ...;
 //    Retriever retriever("https://i18napis.appspot.com/ssl-address/",
@@ -57,12 +57,12 @@ class Retriever {
   // Callback for when a rule is retrieved from |storage_|.
   void OnDataRetrievedFromStorage(bool success,
                                   const std::string& key,
-                                  const std::string& data);
+                                  const std::string& stored_data);
 
   // Callback for when a rule is retrieved by |downloader_|.
   void OnDownloaded(bool success,
                     const std::string& url,
-                    const std::string& data);
+                    const std::string& downloaded_data);
 
   // Looks up the callback for |key| in |requests_|, removes it from the map
   // and returns it. Assumes that |key| is in fact in |requests_|.