Update some uses of char16 to use the base:: namespace.

components/autofill/core/browser/address.cc

Index: components/autofill/core/browser/address.cc
diff --git a/components/autofill/core/browser/address.cc b/components/autofill/core/browser/address.cc
index 242fa24551298b1f68475077a396861a805cbef2..031ff6b808e1b488b0e58814c010721e0a724dc5 100644
--- a/components/autofill/core/browser/address.cc
+++ b/components/autofill/core/browser/address.cc
@@ -120,7 +120,7 @@ void Address::SetRawInfo(ServerFieldType type, const base::string16& value) {
       break;
 
     case ADDRESS_HOME_STREET_ADDRESS:
-      base::SplitString(value, char16('\n'), &street_address_);
+      base::SplitString(value, base::char16('\n'), &street_address_);
       break;
 
     default:
@@ -164,7 +164,7 @@ bool Address::SetInfo(const AutofillType& type,
   // format, so the code would have to rely on iffy heuristics at best.
   // Instead, just give up when importing addresses like this.
   if (storable_type == ADDRESS_HOME_STREET_ADDRESS && !value.empty() &&
-      value.find(char16('\n')) == base::string16::npos) {
+      value.find(base::char16('\n')) == base::string16::npos) {
     street_address_.clear();
     return false;
   }