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

chrome/browser/extensions/page_action_browsertest.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/strings/utf_string_conversions.h"
 #include "chrome/browser/extensions/extension_action.h"
 #include "chrome/browser/extensions/extension_action_manager.h"
 #include "chrome/browser/extensions/extension_action_test_util.h"
 #include "chrome/browser/extensions/extension_browsertest.h"
 #include "chrome/browser/extensions/extension_tab_util.h"
@@ skipping 15 matching lines @@
 
 const std::string kHashPageA =
     "files/extensions/api_test/page_action/hash_change/test_page_A.html";
 const std::string kHashPageAHash = kHashPageA + "#asdf";
 const std::string kHashPageB =
     "files/extensions/api_test/page_action/hash_change/test_page_B.html";
 
 IN_PROC_BROWSER_TEST_F(ExtensionBrowserTest, PageActionCrash25562) {
   ASSERT_TRUE(test_server()->Start());
 
-  CommandLine::ForCurrentProcess()->AppendSwitch(
+  base::CommandLine::ForCurrentProcess()->AppendSwitch(
       switches::kAllowLegacyExtensionManifests);
 
   // This page action will not show an icon, since it doesn't specify one but
   // is included here to test for a crash (http://crbug.com/25562).
   ASSERT_TRUE(LoadExtension(
       test_data_dir_.AppendASCII("browsertest")
                     .AppendASCII("crash_25562")));
 
   // Navigate to the feed page.
   GURL feed_url = test_server()->GetURL(kFeedPage);
@@ skipping 153 matching lines @@
   int tab_id = ExtensionTabUtil::GetTabId(
       browser()->tab_strip_model()->GetActiveWebContents());
   EXPECT_STREQ(base::WideToUTF8(L"Hreggvi\u00F0ur").c_str(),
                ExtensionActionManager::Get(browser()->profile())->
                GetPageAction(*extension)->
                GetTitle(tab_id).c_str());
 }
 
 }  // namespace
 }  // namespace extensions