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

chrome/utility/importer/ie_importer_win.cc

Index: chrome/utility/importer/ie_importer_win.cc
diff --git a/chrome/utility/importer/ie_importer_win.cc b/chrome/utility/importer/ie_importer_win.cc
index 0779fb3800ecb54cb492aaf8c36ad8da286a8a45..96b90d084306cc8d4c74cc1f64e55c1cf46ad643 100644
--- a/chrome/utility/importer/ie_importer_win.cc
+++ b/chrome/utility/importer/ie_importer_win.cc
@@ -46,15 +46,15 @@
 namespace {
 
 // Registry key paths from which we import IE settings.
-const char16 kSearchScopePath[] =
+const base::char16 kSearchScopePath[] =
   L"Software\\Microsoft\\Internet Explorer\\SearchScopes";
-const char16 kIEVersionKey[] =
+const base::char16 kIEVersionKey[] =
   L"Software\\Microsoft\\Internet Explorer";
-const char16 kIEToolbarKey[] =
+const base::char16 kIEToolbarKey[] =
   L"Software\\Microsoft\\Internet Explorer\\Toolbar";
 
 // NTFS stream name of favicon image data.
-const char16 kFaviconStreamName[] = L":favicon:$DATA";
+const base::char16 kFaviconStreamName[] = L":favicon:$DATA";
 
 // A struct that hosts the information of AutoComplete data in PStore.
 struct AutoCompleteInfo {