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

content/browser/web_contents/opened_by_dom_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/command_line.h"
 #include "base/strings/stringprintf.h"
 #include "content/public/browser/web_contents.h"
 #include "content/public/browser/web_contents_delegate.h"
 #include "content/public/common/content_switches.h"
 #include "content/public/test/browser_test_utils.h"
@@ skipping 24 matching lines @@
  private:
   bool close_contents_called_;
 
   DISALLOW_COPY_AND_ASSIGN(CloseTrackingDelegate);
 };
 
 }  // namespace
 
 class OpenedByDOMTest : public ContentBrowserTest {
  protected:
-  void SetUpCommandLine(CommandLine* command_line) override {
+  void SetUpCommandLine(base::CommandLine* command_line) override {
     // Use --site-per-process to force process swaps on cross-site navigations.
     command_line->AppendSwitch(switches::kSitePerProcess);
   }
 
   bool AttemptCloseFromJavaScript(WebContents* web_contents) {
     CloseTrackingDelegate close_tracking_delegate;
     WebContentsDelegate* old_delegate = web_contents->GetDelegate();
     web_contents->SetDelegate(&close_tracking_delegate);
 
     const char kCloseWindowScript[] =
@@ skipping 75 matching lines @@
   url3 = url3.ReplaceComponents(replace_host);
 
   NavigateToURL(shell(), url1);
 
   Shell* popup = OpenWindowFromJavaScript(shell(), url2);
   NavigateToURL(popup, url3);
   EXPECT_TRUE(AttemptCloseFromJavaScript(popup->web_contents()));
 }
 
 }  // namespace content