Add base:: to string16s in chrome/.

chrome/utility/importer/external_process_importer_bridge.cc

Index: chrome/utility/importer/external_process_importer_bridge.cc
diff --git a/chrome/utility/importer/external_process_importer_bridge.cc b/chrome/utility/importer/external_process_importer_bridge.cc
index 747a55c8629b5001e916512e98350e1838eac768..813bdd804306039fda522bc98da67452d7388073 100644
--- a/chrome/utility/importer/external_process_importer_bridge.cc
+++ b/chrome/utility/importer/external_process_importer_bridge.cc
@@ -41,7 +41,7 @@ ExternalProcessImporterBridge::ExternalProcessImporterBridge(
 
 void ExternalProcessImporterBridge::AddBookmarks(
     const std::vector<ImportedBookmarkEntry>& bookmarks,
-    const string16& first_folder_name) {
+    const base::string16& first_folder_name) {
   Send(new ProfileImportProcessHostMsg_NotifyBookmarksImportStart(
       first_folder_name, bookmarks.size()));
 
@@ -158,8 +158,9 @@ void ExternalProcessImporterBridge::NotifyEnded() {
   // The internal process detects import end when all items have been received.
 }
 
-string16 ExternalProcessImporterBridge::GetLocalizedString(int message_id) {
-  string16 message;
+base::string16 ExternalProcessImporterBridge::GetLocalizedString(
+    int message_id) {
+  base::string16 message;
   localized_strings_->GetString(base::IntToString(message_id), &message);
   return message;
 }