Move CommandLine to base namespace.

chrome/test/base/test_launcher_utils.h

Index: chrome/test/base/test_launcher_utils.h
diff --git a/chrome/test/base/test_launcher_utils.h b/chrome/test/base/test_launcher_utils.h
index 18d46b5cb61807fbf3af0cf275eac7b513ab04db..24bd23db5d47e015c3e114ce2c026aab6215dcf8 100644
--- a/chrome/test/base/test_launcher_utils.h
+++ b/chrome/test/base/test_launcher_utils.h
@@ -10,14 +10,16 @@
 #include "base/compiler_specific.h"
 #include "base/files/file_path.h"
 
+namespace base {
 class CommandLine;
+}
 
 // A set of utilities for test code that launches separate processes.
 namespace test_launcher_utils {
 
 // Appends browser switches to provided |command_line| to be used
 // when running under tests.
-void PrepareBrowserCommandLineForTests(CommandLine* command_line);
+void PrepareBrowserCommandLineForTests(base::CommandLine* command_line);
 
 // Overrides the current process' user data dir.
 bool OverrideUserDataDir(