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

chrome/browser/chromeos/login/crash_restore_browsertest.cc

 // Copyright 2013 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 <vector>
 
 #include "base/command_line.h"
 #include "base/memory/ref_counted.h"
 #include "base/run_loop.h"
@@ skipping 19 matching lines @@
 const char kUserId3[] = "user3@example.com";
 
 }  // namespace
 
 class CrashRestoreSimpleTest : public InProcessBrowserTest {
  protected:
   CrashRestoreSimpleTest() {}
 
   virtual ~CrashRestoreSimpleTest() {}
 
-  virtual void SetUpCommandLine(CommandLine* command_line) override {
+  virtual void SetUpCommandLine(base::CommandLine* command_line) override {
     command_line->AppendSwitchASCII(switches::kLoginUser, kUserId1);
     command_line->AppendSwitchASCII(
         switches::kLoginProfile,
         CryptohomeClient::GetStubSanitizedUsername(kUserId1));
   }
 
   virtual void SetUpInProcessBrowserTestFixture() override {
     // Redirect session_manager DBus calls to FakeSessionManagerClient.
     session_manager_client_ = new FakeSessionManagerClient;
     chromeos::DBusThreadManager::GetSetterForTesting()->SetSessionManagerClient(
@@ skipping 93 matching lines @@
             users[0]->username_hash());
   EXPECT_EQ(kUserId2, users[1]->email());
   EXPECT_EQ(CryptohomeClient::GetStubSanitizedUsername(kUserId2),
             users[1]->username_hash());
   EXPECT_EQ(kUserId1, users[2]->email());
   EXPECT_EQ(CryptohomeClient::GetStubSanitizedUsername(kUserId1),
             users[2]->username_hash());
 }
 
 }  // namespace chromeos