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

chrome/browser/ui/webui/ntp/new_tab_ui_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/logging.h"
 #include "chrome/browser/ui/browser.h"
 #include "chrome/browser/ui/browser_commands.h"
 #include "chrome/browser/ui/tabs/tab_strip_model.h"
 #include "chrome/common/chrome_switches.h"
@@ skipping 134 matching lines @@
 // Navigate to incognito NTP. Fails if there are console errors.
 IN_PROC_BROWSER_TEST_F(NewTabUIBrowserTest, ShowIncognito) {
   ui_test_utils::NavigateToURL(CreateIncognitoBrowser(),
                                GURL(chrome::kChromeUINewTabURL));
 }
 
 class NewTabUIProcessPerTabTest : public NewTabUIBrowserTest {
  public:
    NewTabUIProcessPerTabTest() {}
 
-   void SetUpCommandLine(CommandLine* command_line) override {
+   void SetUpCommandLine(base::CommandLine* command_line) override {
      command_line->AppendSwitch(switches::kProcessPerTab);
    }
 };
 
 // Navigates away from NTP before it commits, in process-per-tab mode.
 // Ensures that we don't load the normal page in the NTP process (and thus
 // crash), as in http://crbug.com/69224.
 // If this flakes, use http://crbug.com/87200
 IN_PROC_BROWSER_TEST_F(NewTabUIProcessPerTabTest, NavBeforeNTPCommits) {
   // Bring up a new tab page.
   ui_test_utils::NavigateToURL(browser(), GURL(chrome::kChromeUINewTabURL));
 
   // Navigate to chrome://hang/ to stall the process.
   ui_test_utils::NavigateToURLWithDisposition(
       browser(), GURL(content::kChromeUIHangURL), CURRENT_TAB, 0);
 
   // Visit a normal URL in another NTP that hasn't committed.
   ui_test_utils::NavigateToURLWithDisposition(
       browser(), GURL(chrome::kChromeUINewTabURL), NEW_FOREGROUND_TAB, 0);
 
   // We don't use ui_test_utils::NavigateToURLWithDisposition because that waits
   // for current loading to stop.
   content::TestNavigationObserver observer(
       browser()->tab_strip_model()->GetActiveWebContents());
   browser()->OpenURL(OpenURLParams(
       GURL("data:text/html,hello world"), Referrer(), CURRENT_TAB,
       ui::PAGE_TRANSITION_TYPED, false));
   observer.Wait();
 }