Replace wstring with string16 in history. The only time wstring is used now in history is for bookmark-related stuff (the bookmarks system is still wstring-based).

The substantial change here is in RTL to make a string16 variant of the functions and in changing the WordIterator to use string16 (this cleaned up some weird utf-32 code).

TEST=none
BUG=none
Review URL: http://codereview.chromium.org/2808017

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@50597 0039d316-1c4b-4281-b951-d872f2087c98
diff --git a/chrome/browser/importer/firefox3_importer.cc b/chrome/browser/importer/firefox3_importer.cc
index 775e8ca..2b95cc3 100644
--- a/chrome/browser/importer/firefox3_importer.cc
+++ b/chrome/browser/importer/firefox3_importer.cc
@@ -109,7 +109,7 @@
       continue;
 
     history::URLRow row(url);
-    row.set_title(s.column_wstring(1));
+    row.set_title(UTF8ToUTF16(s.column_string(1)));
     row.set_visit_count(s.column_int(2));
     row.set_hidden(s.column_int(3) == 1);
     row.set_typed_count(s.column_int(4));