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

chrome/browser/extensions/api/content_settings/content_settings_apitest.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 "base/prefs/pref_service.h"
 #include "base/strings/utf_string_conversions.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/chrome_notification_types.h"
 #include "chrome/browser/content_settings/cookie_settings.h"
 #include "chrome/browser/extensions/api/content_settings/content_settings_api.h"
@@ skipping 16 matching lines @@
 }
 
 }  // namespace
 
 namespace extensions {
 
 class ExtensionContentSettingsApiTest : public ExtensionApiTest {
  public:
   ExtensionContentSettingsApiTest() : profile_(NULL) {}
 
-  void SetUpCommandLine(CommandLine* command_line) override {
+  void SetUpCommandLine(base::CommandLine* command_line) override {
     ExtensionApiTest::SetUpCommandLine(command_line);
     command_line->AppendSwitch(switches::kDisablePluginsDiscovery);
   }
 
   void SetUpOnMainThread() override {
     ExtensionApiTest::SetUpOnMainThread();
 
     // The browser might get closed later (and therefore be destroyed), so we
     // save the profile.
     profile_ = browser()->profile();
@@ skipping 180 matching lines @@
                            base::FilePath(kBarPath),
                            base::ASCIIToUTF16("2.3.4"),
                            base::ASCIIToUTF16("bar")),
       false);
 
   EXPECT_TRUE(RunExtensionTest("content_settings/getresourceidentifiers"))
       << message_;
 }
 
 }  // namespace extensions