Update uses of UTF conversions in content/ to use the base:: namespace.

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 65bf7397c1e6f9a3216a13630fea28132b47e6df..14326cabcadd4f5e40898161709e8b2a66014080 100644
--- a/content/shell/browser/shell_javascript_dialog_gtk.cc
+++ b/content/shell/browser/shell_javascript_dialog_gtk.cc
@@ -23,7 +23,7 @@ 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 base::UTF8ToUTF16(gtk_entry_get_text(GTK_ENTRY(widget)));
   return base::string16();
 }
 
@@ -70,7 +70,7 @@ ShellJavaScriptDialog::ShellJavaScriptDialog(
                                        gtk_message_type,
                                        buttons,
                                        "%s",
-                                       UTF16ToUTF8(message_text).c_str());
+                                       base::UTF16ToUTF8(message_text).c_str());
   g_signal_connect(gtk_dialog_,
                    "delete-event",
                    G_CALLBACK(gtk_widget_hide_on_delete),
@@ -89,7 +89,7 @@ ShellJavaScriptDialog::ShellJavaScriptDialog(
         gtk_dialog_get_content_area(GTK_DIALOG(gtk_dialog_));
     GtkWidget* text_box = gtk_entry_new();
     gtk_entry_set_text(GTK_ENTRY(text_box),
-                       UTF16ToUTF8(default_prompt_text).c_str());
+                       base::UTF16ToUTF8(default_prompt_text).c_str());
     gtk_box_pack_start(GTK_BOX(content_area), text_box, TRUE, TRUE, 0);
     g_object_set_data(G_OBJECT(gtk_dialog_), kPromptTextId, text_box);
     gtk_entry_set_activates_default(GTK_ENTRY(text_box), TRUE);