Fix HandleJavaScriptDialog.

chrome/browser/ui/javascript_dialogs/javascript_dialog_cocoa.mm

Index: chrome/browser/ui/javascript_dialogs/javascript_dialog_cocoa.mm
diff --git a/chrome/browser/ui/javascript_dialogs/javascript_dialog_cocoa.mm b/chrome/browser/ui/javascript_dialogs/javascript_dialog_cocoa.mm
index c5ca13da720872eb598cc10cdb89514c955a647e..b8179c863752a631a0ccef308e4af063b900ae9b 100644
--- a/chrome/browser/ui/javascript_dialogs/javascript_dialog_cocoa.mm
+++ b/chrome/browser/ui/javascript_dialogs/javascript_dialog_cocoa.mm
@@ -169,6 +169,13 @@ void JavaScriptDialogCocoa::CloseDialogWithoutCallback() {
   impl_->window_->CloseWebContentsModalDialog();
 }
 
+base::string16 JavaScriptDialogCocoa::GetUserInput() {
+  if (!impl_->textField_)
+    return base::string16();
+
+  return base::SysNSStringToUTF16([impl_->textField_ stringValue]);
+}
+
 JavaScriptDialogCocoa::JavaScriptDialogCocoa(
     content::WebContents* parent_web_contents,
     content::WebContents* alerting_web_contents,