Make callers of CommandLine use it via the base:: namespace.

chrome/browser/ui/libgtk2ui/gtk2_util.cc

Index: chrome/browser/ui/libgtk2ui/gtk2_util.cc
diff --git a/chrome/browser/ui/libgtk2ui/gtk2_util.cc b/chrome/browser/ui/libgtk2ui/gtk2_util.cc
index 56beb6d083619118049f86566b96a65f50d9bfb7..704472c6826292392ae1f413c2829273d36ef2d7 100644
--- a/chrome/browser/ui/libgtk2ui/gtk2_util.cc
+++ b/chrome/browser/ui/libgtk2ui/gtk2_util.cc
@@ -23,7 +23,7 @@ namespace {
 
 const char kAuraTransientParent[] = "aura-transient-parent";
 
-void CommonInitFromCommandLine(const CommandLine& command_line,
+void CommonInitFromCommandLine(const base::CommandLine& command_line,
                                void (*init_func)(gint*, gchar***)) {
   const std::vector<std::string>& args = command_line.argv();
   int argc = args.size();
@@ -50,7 +50,7 @@ void CommonInitFromCommandLine(const CommandLine& command_line,
 
 namespace libgtk2ui {
 
-void GtkInitFromCommandLine(const CommandLine& command_line) {
+void GtkInitFromCommandLine(const base::CommandLine& command_line) {
   CommonInitFromCommandLine(command_line, gtk_init);
 }