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

chrome/browser/apps/ephemeral_app_launcher_browsertest.cc

 // Copyright 2014 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 "base/message_loop/message_loop_proxy.h"
 #include "chrome/browser/apps/ephemeral_app_launcher.h"
 #include "chrome/browser/apps/ephemeral_app_service.h"
 #include "chrome/browser/extensions/extension_install_checker.h"
 #include "chrome/browser/extensions/extension_service.h"
 #include "chrome/browser/extensions/install_tracker.h"
@@ skipping 295 matching lines @@
  public:
   void SetUpCommandLine(base::CommandLine* command_line) override {
     // Skip EphemeralAppLauncherTest as it enables the feature.
     WebstoreInstallerTest::SetUpCommandLine(command_line);
   }
 };
 
 // Verifies that an ephemeral app will not be installed and launched if the
 // feature is disabled.
 IN_PROC_BROWSER_TEST_F(EphemeralAppLauncherTestDisabled, FeatureDisabled) {
-  CommandLine::ForCurrentProcess()->AppendSwitch(
+  base::CommandLine::ForCurrentProcess()->AppendSwitch(
       app_list::switches::kDisableExperimentalAppList);
   RunLaunchTest(
       kDefaultAppCrxFilename, webstore_install::LAUNCH_FEATURE_DISABLED, false);
   EXPECT_FALSE(GetInstalledExtension(kDefaultAppId));
 }
 
 // Verifies that an app with no permission warnings will be installed
 // ephemerally and launched without prompting the user.
 IN_PROC_BROWSER_TEST_F(EphemeralAppLauncherTest,
                        LaunchAppWithNoPermissionWarnings) {
@@ skipping 235 matching lines @@
 }
 
 // Verifies that a launch will fail if a duplicate launch is in progress.
 IN_PROC_BROWSER_TEST_F(EphemeralAppLauncherTest, DuplicateLaunchInProgress) {
   extensions::ActiveInstallData install_data(kDefaultAppId);
   install_data.is_ephemeral = true;
   InstallTracker::Get(profile())->AddActiveInstall(install_data);
 
   RunLaunchTest(kDefaultAppId, webstore_install::LAUNCH_IN_PROGRESS, false);
 }