Convert string16 to use base namespace.

TBR=sky

Review URL: https://codereview.chromium.org/109233002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@239538 0039d316-1c4b-4281-b951-d872f2087c98
diff --git a/chrome/browser/net/chrome_network_delegate.cc b/chrome/browser/net/chrome_network_delegate.cc
index 9deb2f80..e021791 100644
--- a/chrome/browser/net/chrome_network_delegate.cc
+++ b/chrome/browser/net/chrome_network_delegate.cc
@@ -576,7 +576,7 @@
 }
 
 void ChromeNetworkDelegate::OnPACScriptError(int line_number,
-                                             const string16& error) {
+                                             const base::string16& error) {
   extensions::ProxyEventRouter::GetInstance()->OnPACScriptError(
       event_router_.get(), profile_, line_number, error);
 }