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

chrome/browser/ui/panels/panel_extension_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/command_line.h"
 #include "base/path_service.h"
 #include "base/strings/utf_string_conversions.h"
 #include "chrome/app/chrome_command_ids.h"
 #include "chrome/browser/chrome_notification_types.h"
 #include "chrome/browser/extensions/extension_browsertest.h"
@@ skipping 14 matching lines @@
 #include "testing/gtest/include/gtest/gtest.h"
 
 #if defined(OS_MACOSX)
 #include "base/mac/scoped_nsautorelease_pool.h"
 #endif
 
 using extensions::Extension;
 
 class PanelExtensionBrowserTest : public ExtensionBrowserTest {
  protected:
-  void SetUpCommandLine(CommandLine* command_line) override {
+  void SetUpCommandLine(base::CommandLine* command_line) override {
     ExtensionBrowserTest::SetUpCommandLine(command_line);
     command_line->AppendSwitch(switches::kEnablePanels);
     PathService::Get(chrome::DIR_TEST_DATA, &test_data_dir_);
     test_data_dir_ = test_data_dir_.AppendASCII("panels");
   }
 
   Panel* CreatePanelFromExtension(const Extension* extension) const {
 #if defined(OS_MACOSX)
     // Opening panels on a Mac causes NSWindowController of the Panel window
     // to be autoreleased. We need a pool drained after it's done so the test
@@ skipping 222 matching lines @@
   EXPECT_FALSE(menu->HasCommandWithId(IDC_CONTENT_CONTEXT_COPYLINKLOCATION));
 
   // Execute the extension's custom menu item and wait for the extension's
   // script to tell us its onclick fired.
   ExtensionTestMessageListener onclick_listener("clicked", false);
   int command_id = IDC_EXTENSIONS_CONTEXT_CUSTOM_FIRST;
   ASSERT_TRUE(menu->IsCommandIdEnabled(command_id));
   menu->ExecuteCommand(command_id, 0);
   EXPECT_TRUE(onclick_listener.WaitUntilSatisfied());
 }