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

chrome/browser/ui/views/athena/chrome_browser_main_extra_parts_athena.cc

Index: chrome/browser/ui/views/athena/chrome_browser_main_extra_parts_athena.cc
diff --git a/chrome/browser/ui/views/athena/chrome_browser_main_extra_parts_athena.cc b/chrome/browser/ui/views/athena/chrome_browser_main_extra_parts_athena.cc
index db068c1834f84c66b6e7e72bb2069b60e2a56295..f7cba3e4d07a2e0f2a442a92a272b13b1e1610ee 100644
--- a/chrome/browser/ui/views/athena/chrome_browser_main_extra_parts_athena.cc
+++ b/chrome/browser/ui/views/athena/chrome_browser_main_extra_parts_athena.cc
@@ -45,13 +45,13 @@ class ChromeBrowserMainExtraPartsAthena : public ChromeBrowserMainExtraParts,
     ui::SelectFileDialog::SetFactory(new SelectFileDialogExtensionFactory);
   }
   virtual void PostProfileInit() override {
-    if (!CommandLine::ForCurrentProcess()->HasSwitch(
+    if (!base::CommandLine::ForCurrentProcess()->HasSwitch(
             switches::kDisableZeroBrowsersOpenForTests)) {
       chrome::IncrementKeepAliveCount();
     }
     Profile* profile =
         g_browser_process->profile_manager()->GetActiveUserProfile();
-    if (!CommandLine::ForCurrentProcess()->HasSwitch(
+    if (!base::CommandLine::ForCurrentProcess()->HasSwitch(
             chromeos::switches::kLoginManager)) {
       athena::CreateVirtualKeyboardWithContext(profile);
       athena::StartAthenaSessionWithContext(profile);