Move CommandLine to base namespace.

chrome/installer/setup/setup_main.h

Index: chrome/installer/setup/setup_main.h
diff --git a/chrome/installer/setup/setup_main.h b/chrome/installer/setup/setup_main.h
index 45f92d84d9e62ced8bf53ced9b3219759206898f..5bcf457fb94e5dfacc86a32e1a916852107e234e 100644
--- a/chrome/installer/setup/setup_main.h
+++ b/chrome/installer/setup/setup_main.h
@@ -10,9 +10,8 @@
 
 #include "chrome/installer/util/util_constants.h"
 
-class CommandLine;
-
 namespace base {
+class CommandLine;
 class FilePath;
 }  // namespace base
 
@@ -28,7 +27,7 @@ class MasterPreferences;
 // |true| if installation was delegated to a pre-existing higher version.
 InstallStatus InstallProductsHelper(const InstallationState& original_state,
                                     const base::FilePath& setup_exe,
-                                    const CommandLine& cmd_line,
+                                    const base::CommandLine& cmd_line,
                                     const MasterPreferences& prefs,
                                     const InstallerState& installer_state,
                                     base::FilePath* installer_directory,