Replace string16 with base::string16.

chrome/browser/chromeos/input_method/input_method_delegate_impl.cc

Index: chrome/browser/chromeos/input_method/input_method_delegate_impl.cc
diff --git a/chrome/browser/chromeos/input_method/input_method_delegate_impl.cc b/chrome/browser/chromeos/input_method/input_method_delegate_impl.cc
index 50a70b801bd5f77f926f4a7f07a4ccd8f256dbc3..ddfbe69dea6b4f17f41d8981ef514b9847453d28 100644
--- a/chrome/browser/chromeos/input_method/input_method_delegate_impl.cc
+++ b/chrome/browser/chromeos/input_method/input_method_delegate_impl.cc
@@ -26,11 +26,12 @@ std::string InputMethodDelegateImpl::GetHardwareKeyboardLayout() const {
   return std::string();
 }
 
-string16 InputMethodDelegateImpl::GetLocalizedString(int resource_id) const {
+base::string16 InputMethodDelegateImpl::GetLocalizedString(
+    int resource_id) const {
   return l10n_util::GetStringUTF16(resource_id);
 }
 
-string16 InputMethodDelegateImpl::GetDisplayLanguageName(
+base::string16 InputMethodDelegateImpl::GetDisplayLanguageName(
     const std::string& language_code) const {
   DCHECK(g_browser_process);
   return l10n_util::GetDisplayNameForLocale(