Convert string16 to base::string16 in content.

content/shell/browser/shell_javascript_dialog_gtk.cc

Index: content/shell/browser/shell_javascript_dialog_gtk.cc
diff --git a/content/shell/browser/shell_javascript_dialog_gtk.cc b/content/shell/browser/shell_javascript_dialog_gtk.cc
index 87bd6f3124b556096f022142c4902c7ff4d4ff10..65bf7397c1e6f9a3216a13630fea28132b47e6df 100644
--- a/content/shell/browser/shell_javascript_dialog_gtk.cc
+++ b/content/shell/browser/shell_javascript_dialog_gtk.cc
@@ -19,12 +19,12 @@ const char kPromptTextId[] = "content_shell_prompt_text";
 
 // If there's a text entry in the dialog, get the text from the first one and
 // return it.
-string16 GetPromptText(GtkDialog* dialog) {
+base::string16 GetPromptText(GtkDialog* dialog) {
   GtkWidget* widget = static_cast<GtkWidget*>(
       g_object_get_data(G_OBJECT(dialog), kPromptTextId));
   if (widget)
     return UTF8ToUTF16(gtk_entry_get_text(GTK_ENTRY(widget)));
-  return string16();
+  return base::string16();
 }
 
 }  // namespace
@@ -36,8 +36,8 @@ ShellJavaScriptDialog::ShellJavaScriptDialog(
     ShellJavaScriptDialogManager* manager,
     gfx::NativeWindow parent_window,
     JavaScriptMessageType message_type,
-    const string16& message_text,
-    const string16& default_prompt_text,
+    const base::string16& message_text,
+    const base::string16& default_prompt_text,
     const JavaScriptDialogManager::DialogClosedCallback& callback)
     : manager_(manager),
       callback_(callback),
@@ -113,7 +113,7 @@ void ShellJavaScriptDialog::OnResponse(GtkWidget* dialog, int response_id) {
       break;
     case GTK_RESPONSE_CANCEL:
     case GTK_RESPONSE_DELETE_EVENT:
-      callback_.Run(false, string16());
+      callback_.Run(false, base::string16());
       break;
     default:
       NOTREACHED();