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

chrome/browser/extensions/extension_disabled_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/files/file_path.h"
 #include "base/files/scoped_temp_dir.h"
 #include "base/threading/sequenced_worker_pool.h"
 #include "chrome/app/chrome_command_ids.h"
 #include "chrome/browser/extensions/extension_browsertest.h"
 #include "chrome/browser/extensions/extension_service.h"
@@ skipping 15 matching lines @@
 #include "sync/protocol/extension_specifics.pb.h"
 #include "sync/protocol/sync.pb.h"
 
 using content::BrowserThread;
 using extensions::Extension;
 using extensions::ExtensionRegistry;
 using extensions::ExtensionPrefs;
 
 class ExtensionDisabledGlobalErrorTest : public ExtensionBrowserTest {
  protected:
-  void SetUpCommandLine(CommandLine* command_line) override {
+  void SetUpCommandLine(base::CommandLine* command_line) override {
     ExtensionBrowserTest::SetUpCommandLine(command_line);
     command_line->AppendSwitchASCII(switches::kAppsGalleryUpdateURL,
                                     "http://localhost/autoupdate/updates.xml");
   }
 
   void SetUpOnMainThread() override {
     ExtensionBrowserTest::SetUpOnMainThread();
     EXPECT_TRUE(scoped_temp_dir_.CreateUniqueTempDir());
     service_ = extensions::ExtensionSystem::Get(
         browser()->profile())->extension_service();
@@ skipping 198 matching lines @@
 
   const Extension* extension = service_->GetExtensionById(extension_id, true);
   ASSERT_TRUE(extension);
   EXPECT_EQ("2", extension->VersionString());
   EXPECT_EQ(1u, registry_->disabled_extensions().size());
   EXPECT_EQ(Extension::DISABLE_REMOTE_INSTALL,
             ExtensionPrefs::Get(service_->profile())
                 ->GetDisableReasons(extension_id));
   EXPECT_TRUE(GetExtensionDisabledGlobalError());
 }