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

chrome/browser/chromeos/policy/user_cloud_policy_manager_chromeos_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 <string>
 
 #include "base/command_line.h"
 #include "base/compiler_specific.h"
 #include "base/files/file_path.h"
 #include "base/files/file_util.h"
@@ skipping 50 matching lines @@
   virtual void SetUp() override {
     ASSERT_TRUE(temp_dir_.CreateUniqueTempDir());
     SetServerPolicy();
 
     test_server_.reset(new LocalPolicyTestServer(policy_file_path()));
     ASSERT_TRUE(test_server_->Start());
 
     OobeBaseTest::SetUp();
   }
 
-  virtual void SetUpCommandLine(CommandLine* command_line) override {
+  virtual void SetUpCommandLine(base::CommandLine* command_line) override {
     command_line->AppendSwitchASCII(policy::switches::kDeviceManagementUrl,
                                     test_server_->GetServiceURL().spec());
     OobeBaseTest::SetUpCommandLine(command_line);
   }
 
   virtual void SetUpOnMainThread() override {
     SetMergeSessionParams(kAccountId);
     SetupGaiaServerWithAccessTokens();
     OobeBaseTest::SetUpOnMainThread();
   }
@@ skipping 96 matching lines @@
   ASSERT_TRUE(tabs);
   const int expected_tab_count = static_cast<int>(arraysize(kStartupURLs));
   EXPECT_EQ(expected_tab_count, tabs->count());
   for (int i = 0; i < expected_tab_count && i < tabs->count(); ++i) {
     EXPECT_EQ(GURL(kStartupURLs[i]),
               tabs->GetWebContentsAt(i)->GetVisibleURL());
   }
 }
 
 }  // namespace policy