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

chrome/browser/chrome_browser_main_mac.mm

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/chrome_browser_main_mac.h"
 
 #import <Cocoa/Cocoa.h>
 #include <sys/sysctl.h>
 
 #include "base/command_line.h"
@@ skipping 147 matching lines @@
     : ChromeBrowserMainPartsPosix(parameters) {
 }
 
 ChromeBrowserMainPartsMac::~ChromeBrowserMainPartsMac() {
 }
 
 void ChromeBrowserMainPartsMac::PreEarlyInitialization() {
   ChromeBrowserMainPartsPosix::PreEarlyInitialization();
 
   if (base::mac::WasLaunchedAsLoginItemRestoreState()) {
-    CommandLine* singleton_command_line = CommandLine::ForCurrentProcess();
+    base::CommandLine* singleton_command_line =
+        base::CommandLine::ForCurrentProcess();
     singleton_command_line->AppendSwitch(switches::kRestoreLastSession);
   } else if (base::mac::WasLaunchedAsHiddenLoginItem()) {
-    CommandLine* singleton_command_line = CommandLine::ForCurrentProcess();
+    base::CommandLine* singleton_command_line =
+        base::CommandLine::ForCurrentProcess();
     singleton_command_line->AppendSwitch(switches::kNoStartupWindow);
   }
 
   RecordCatSixtyFour();
 }
 
 void ChromeBrowserMainPartsMac::PreMainMessageLoopStart() {
   MacStartupProfiler::GetInstance()->Profile(
       MacStartupProfiler::PRE_MAIN_MESSAGE_LOOP_START);
   ChromeBrowserMainPartsPosix::PreMainMessageLoopStart();
@@ skipping 100 matching lines @@
       MacStartupProfiler::POST_PROFILE_INIT);
   ChromeBrowserMainPartsPosix::PostProfileInit();
   g_browser_process->metrics_service()->RecordBreakpadRegistration(
       breakpad::IsCrashReporterEnabled());
 }
 
 void ChromeBrowserMainPartsMac::DidEndMainMessageLoop() {
   AppController* appController = [NSApp delegate];
   [appController didEndMainMessageLoop];
 }