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

content/common/gpu/media/video_decode_accelerator_unittest.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.
 //
 // The bulk of this file is support code; sorry about that.  Here's an overview
 // to hopefully help readers of this code:
 // - RenderingHelper is charged with interacting with X11/{EGL/GLES2,GLX/GL} or
 //   Win/EGL.
 // - ClientState is an enum for the state of the decode client used by the test.
 // - ClientStateNotification is a barrier abstraction that allows the test code
@@ skipping 1405 matching lines @@
 
   // Needed to enable DVLOG through --vmodule.
   logging::LoggingSettings settings;
   settings.logging_dest = logging::LOG_TO_SYSTEM_DEBUG_LOG;
   CHECK(logging::InitLogging(settings));
 
   const base::CommandLine* cmd_line = base::CommandLine::ForCurrentProcess();
   DCHECK(cmd_line);
 
   base::CommandLine::SwitchMap switches = cmd_line->GetSwitches();
-  for (CommandLine::SwitchMap::const_iterator it = switches.begin();
+  for (base::CommandLine::SwitchMap::const_iterator it = switches.begin();
        it != switches.end(); ++it) {
     if (it->first == "test_video_data") {
       content::g_test_video_data = it->second.c_str();
       continue;
     }
     // The output log for VDA performance test.
     if (it->first == "output_log") {
       content::g_output_log = it->second.c_str();
       continue;
     }
@@ skipping 23 matching lines @@
     if (it->first == "v" || it->first == "vmodule")
       continue;
     LOG(FATAL) << "Unexpected switch: " << it->first << ":" << it->second;
   }
 
   base::ShadowingAtExitManager at_exit_manager;
   content::RenderingHelper::InitializeOneOff();
 
   return RUN_ALL_TESTS();
 }