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

sync/tools/sync_listen_notifications.cc

Index: sync/tools/sync_listen_notifications.cc
diff --git a/sync/tools/sync_listen_notifications.cc b/sync/tools/sync_listen_notifications.cc
index 3fa5a33afc9aabf7331f638d68daa9c988e274bc..13468a4cbd968abf839e82cf86b932b1fa5e40cc 100644
--- a/sync/tools/sync_listen_notifications.cc
+++ b/sync/tools/sync_listen_notifications.cc
@@ -109,9 +109,8 @@ class MyTestURLRequestContextGetter : public net::TestURLRequestContextGetter {
 };
 
 notifier::NotifierOptions ParseNotifierOptions(
-    const CommandLine& command_line,
-    const scoped_refptr<net::URLRequestContextGetter>&
-        request_context_getter) {
+    const base::CommandLine& command_line,
+    const scoped_refptr<net::URLRequestContextGetter>& request_context_getter) {
   notifier::NotifierOptions notifier_options;
   notifier_options.request_context_getter = request_context_getter;
 
@@ -142,7 +141,7 @@ int SyncListenNotificationsMain(int argc, char* argv[]) {
   base::mac::ScopedNSAutoreleasePool pool;
 #endif
   base::AtExitManager exit_manager;
-  CommandLine::Init(argc, argv);
+  base::CommandLine::Init(argc, argv);
   logging::LoggingSettings settings;
   settings.logging_dest = logging::LOG_TO_SYSTEM_DEBUG_LOG;
   logging::InitLogging(settings);
@@ -154,7 +153,8 @@ int SyncListenNotificationsMain(int argc, char* argv[]) {
   io_thread.StartWithOptions(options);
 
   // Parse command line.
-  const CommandLine& command_line = *CommandLine::ForCurrentProcess();
+  const base::CommandLine& command_line =
+      *base::CommandLine::ForCurrentProcess();
   std::string email = command_line.GetSwitchValueASCII(kEmailSwitch);
   std::string token = command_line.GetSwitchValueASCII(kTokenSwitch);
   // TODO(akalin): Write a wrapper script that gets a token for an