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

chrome/browser/chrome_browser_field_trials.cc

 // 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_field_trials.h"
 
 #include <string>
 
 #include "base/command_line.h"
 #include "base/metrics/field_trial.h"
 #include "base/prefs/pref_service.h"
 #include "base/strings/string_util.h"
 #include "base/time/time.h"
 #include "chrome/common/chrome_switches.h"
 #include "chrome/common/chrome_version_info.h"
 #include "chrome/common/variations/uniformity_field_trials.h"
 #include "components/metrics/metrics_pref_names.h"
 #include "components/omnibox/omnibox_field_trial.h"
 
 #if defined(OS_ANDROID) || defined(OS_IOS)
 #include "chrome/browser/chrome_browser_field_trials_mobile.h"
 #else
 #include "chrome/browser/chrome_browser_field_trials_desktop.h"
 #endif
 
 ChromeBrowserFieldTrials::ChromeBrowserFieldTrials(
-    const CommandLine& parsed_command_line)
+    const base::CommandLine& parsed_command_line)
     : parsed_command_line_(parsed_command_line) {
 }
 
 ChromeBrowserFieldTrials::~ChromeBrowserFieldTrials() {
 }
 
 void ChromeBrowserFieldTrials::SetupFieldTrials(const base::Time& install_time,
                                                 PrefService* local_state) {
   DCHECK(!install_time.is_null());
 
@@ skipping 12 matching lines @@
 void ChromeBrowserFieldTrials::InstantiateDynamicTrials() {
   // The following trials are used from renderer process.
   // Mark here so they will be sync-ed.
   base::FieldTrialList::FindValue("CLD1VsCLD2");
   base::FieldTrialList::FindValue("MouseEventPreconnect");
   base::FieldTrialList::FindValue("DisplayList2dCanvas");
   base::FieldTrialList::FindValue("V8ScriptStreaming");
   // Activate the autocomplete dynamic field trials.
   OmniboxFieldTrial::ActivateDynamicTrials();
 }