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

chrome/browser/extensions/api/gcd_private/gcd_private_apitest.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/bind.h"
 #include "base/command_line.h"
 #include "base/json/json_reader.h"
 #include "base/message_loop/message_loop_proxy.h"
 #include "chrome/browser/extensions/api/gcd_private/gcd_private_api.h"
 #include "chrome/browser/extensions/extension_apitest.h"
@@ skipping 210 matching lines @@
 class GcdPrivateAPITest : public ExtensionApiTest {
  public:
   GcdPrivateAPITest() : url_fetcher_factory_(&url_fetcher_impl_factory_) {
 #if defined(ENABLE_MDNS)
     test_service_discovery_client_ =
         new local_discovery::TestServiceDiscoveryClient();
     test_service_discovery_client_->Start();
 #endif  // ENABLE_MDNS
   }
 
-  void SetUpCommandLine(CommandLine* command_line) override {
+  void SetUpCommandLine(base::CommandLine* command_line) override {
     ExtensionApiTest::SetUpCommandLine(command_line);
     command_line->AppendSwitchASCII(
         extensions::switches::kWhitelistedExtensionID,
         "ddchlicdkolnonkihahngkmmmjnjlkkf");
   }
 
 #if defined(ENABLE_WIFI_BOOTSTRAPPING)
   virtual void OnCreateWifiManager() {
     wifi_manager_ = wifi_manager_factory_.GetLastCreatedWifiManager();
 
@@ skipping 122 matching lines @@
   EXPECT_CALL(wifi_manager_factory_, WifiManagerCreated())
       .WillOnce(Invoke(this, &GcdPrivateAPITest::OnCreateWifiManager));
 #endif
 
   EXPECT_TRUE(RunExtensionSubtest("gcd_private/api", "wifi_password.html"));
 }
 
 #endif  // ENABLE_WIFI_BOOTSTRAPPING
 
 }  // namespace