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

chromeos/tools/onc_validator/onc_validator.cc

Index: chromeos/tools/onc_validator/onc_validator.cc
diff --git a/chromeos/tools/onc_validator/onc_validator.cc b/chromeos/tools/onc_validator/onc_validator.cc
index fab8b4ad66eeda78b2a7ad8daf22f66a503ff58a..d47597ebab631135cd093b13fc74633b38d6d5fb 100644
--- a/chromeos/tools/onc_validator/onc_validator.cc
+++ b/chromeos/tools/onc_validator/onc_validator.cc
@@ -107,10 +107,11 @@ scoped_ptr<base::DictionaryValue> ReadDictionary(std::string filename) {
 }
 
 int main(int argc, const char* argv[]) {
-  CommandLine::Init(argc, argv);
+  base::CommandLine::Init(argc, argv);
 
-  const CommandLine& command_line = *CommandLine::ForCurrentProcess();
-  CommandLine::StringVector args = command_line.GetArgs();
+  const base::CommandLine& command_line =
+      *base::CommandLine::ForCurrentProcess();
+  base::CommandLine::StringVector args = command_line.GetArgs();
   if (args.size() != 2) {
     PrintHelp();
     return kStatusArgumentError;