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

chrome/browser/metrics/chrome_browser_main_extra_parts_metrics.cc

 // Copyright (c) 2013 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/metrics/chrome_browser_main_extra_parts_metrics.h"
 
 #include <string>
 
 #include "base/bind.h"
 #include "base/command_line.h"
@@ skipping 178 matching lines @@
     case ui::WM_WMII:
       return UMA_LINUX_WINDOW_MANAGER_WMII;
     case ui::WM_XFWM4:
       return UMA_LINUX_WINDOW_MANAGER_XFWM4;
   }
   return UMA_LINUX_WINDOW_MANAGER_OTHER;
 }
 #endif
 
 void RecordTouchEventState() {
-  const CommandLine& command_line = *CommandLine::ForCurrentProcess();
+  const base::CommandLine& command_line =
+      *base::CommandLine::ForCurrentProcess();
   const std::string touch_enabled_switch =
       command_line.HasSwitch(switches::kTouchEvents) ?
       command_line.GetSwitchValueASCII(switches::kTouchEvents) :
       switches::kTouchEventsAuto;
 
   UMATouchEventsState state;
   if (touch_enabled_switch.empty() ||
       touch_enabled_switch == switches::kTouchEventsEnabled) {
     state = UMA_TOUCH_EVENTS_ENABLED;
   } else if (touch_enabled_switch == switches::kTouchEventsAuto) {
@@ skipping 91 matching lines @@
   }
 }
 
 namespace chrome {
 
 void AddMetricsExtraParts(ChromeBrowserMainParts* main_parts) {
   main_parts->AddParts(new ChromeBrowserMainExtraPartsMetrics());
 }
 
 }  // namespace chrome