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

chrome/browser/metrics/chrome_metrics_service_client.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 "chrome/browser/metrics/chrome_metrics_service_client.h"
 
 #include <vector>
 
 #include "base/bind.h"
 #include "base/callback.h"
@@ skipping 432 matching lines @@
   // Check if all expected requests finished.
   if (--num_async_histogram_fetches_in_progress_ > 0)
     return;
 
   waiting_for_collect_final_metrics_step_ = false;
   collect_final_metrics_done_callback_.Run();
 }
 
 void ChromeMetricsServiceClient::RecordCommandLineMetrics() {
   // Get stats on use of command line.
-  const CommandLine* command_line(CommandLine::ForCurrentProcess());
+  const base::CommandLine* command_line(base::CommandLine::ForCurrentProcess());
   size_t common_commands = 0;
   if (command_line->HasSwitch(switches::kUserDataDir)) {
     ++common_commands;
     UMA_HISTOGRAM_COUNTS_100("Chrome.CommandLineDatDirCount", 1);
   }
 
   if (command_line->HasSwitch(switches::kApp)) {
     ++common_commands;
     UMA_HISTOGRAM_COUNTS_100("Chrome.CommandLineAppModeCount", 1);
   }
@@ skipping 95 matching lines @@
   // Capture the histogram samples.
   if (dumps_with_crash != 0)
     UMA_HISTOGRAM_COUNTS("Chrome.BrowserDumpsWithCrash", dumps_with_crash);
   if (dumps_with_no_crash != 0)
     UMA_HISTOGRAM_COUNTS("Chrome.BrowserDumpsWithNoCrash", dumps_with_no_crash);
   int total_dumps = dumps_with_crash + dumps_with_no_crash;
   if (total_dumps != 0)
     UMA_HISTOGRAM_COUNTS("Chrome.BrowserCrashDumpAttempts", total_dumps);
 }
 #endif  // defined(OS_WIN)