Replace string16 with base::string16.

chrome/browser/chromeos/login/screens/network_screen.cc

Index: chrome/browser/chromeos/login/screens/network_screen.cc
diff --git a/chrome/browser/chromeos/login/screens/network_screen.cc b/chrome/browser/chromeos/login/screens/network_screen.cc
index 94eb70e031773f2c39a53689a9e1cdec1c3eb9c2..af6d66e588267ea1907963a0a2a1ab538bffb090 100644
--- a/chrome/browser/chromeos/login/screens/network_screen.cc
+++ b/chrome/browser/chromeos/login/screens/network_screen.cc
@@ -162,7 +162,7 @@ void NetworkScreen::UpdateStatus() {
   if (is_connected)
     actor_->ClearErrors();
 
-  string16 network_name = network_state_helper_->GetCurrentNetworkName();
+  base::string16 network_name = network_state_helper_->GetCurrentNetworkName();
   if (is_connected) {
     StopWaitingForConnection(network_name);
   } else if (network_state_helper_->IsConnecting()) {
@@ -172,7 +172,7 @@ void NetworkScreen::UpdateStatus() {
   }
 }
 
-void NetworkScreen::StopWaitingForConnection(const string16& network_id) {
+void NetworkScreen::StopWaitingForConnection(const base::string16& network_id) {
   bool is_connected = network_state_helper_->IsConnected();
   if (is_connected && continue_pressed_) {
     NotifyOnConnection();
@@ -189,7 +189,7 @@ void NetworkScreen::StopWaitingForConnection(const string16& network_id) {
   }
 }
 
-void NetworkScreen::WaitForConnection(const string16& network_id) {
+void NetworkScreen::WaitForConnection(const base::string16& network_id) {
   if (network_id_ != network_id || !connection_timer_.IsRunning()) {
     connection_timer_.Stop();
     connection_timer_.Start(FROM_HERE,