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

chrome/browser/ui/webui/options/chromeos/keyboard_handler.cc

Index: chrome/browser/ui/webui/options/chromeos/keyboard_handler.cc
diff --git a/chrome/browser/ui/webui/options/chromeos/keyboard_handler.cc b/chrome/browser/ui/webui/options/chromeos/keyboard_handler.cc
index 97398d92981a92daee4ee87d5026826aaa26fd5f..69b4eae9bbdc8b47db82d11f68f87a479a57fd05 100644
--- a/chrome/browser/ui/webui/options/chromeos/keyboard_handler.cc
+++ b/chrome/browser/ui/webui/options/chromeos/keyboard_handler.cc
@@ -134,11 +134,11 @@ void KeyboardHandler::GetLocalizedValues(
 }
 
 void KeyboardHandler::InitializePage() {
-  bool chromeos_keyboard = CommandLine::ForCurrentProcess()->HasSwitch(
+  bool chromeos_keyboard = base::CommandLine::ForCurrentProcess()->HasSwitch(
       chromeos::switches::kHasChromeOSKeyboard);
   const base::FundamentalValue show_caps_lock_options(!chromeos_keyboard);
 
-  bool has_diamond_key = CommandLine::ForCurrentProcess()->HasSwitch(
+  bool has_diamond_key = base::CommandLine::ForCurrentProcess()->HasSwitch(
       chromeos::switches::kHasChromeOSDiamondKey);
   const base::FundamentalValue show_diamond_key_options(has_diamond_key);