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

tools/ipc_fuzzer/mutate/mutate.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 <stdlib.h>
 
 #include <algorithm>
 #include <iostream>
 #include <ostream>
 #include <set>
@@ skipping 637 matching lines @@
       << " --" << kHelpSwitch << "         - " << kHelpSwitchHelp << "\n"
       << " --" << kFuzzerNameSwitch <<  "  - " << kFuzzerNameSwitchHelp << "\n"
       << " --" << kFrequencySwitch << "    - " << kFrequencySwitchHelp << "\n"
       << " --" << kTypeListSwitch <<  "    - " << kTypeListSwitchHelp << "\n"
       << " --" << kPermuteSwitch << "      - " << kPermuteSwitchHelp << "\n";
 }
 
 }  // namespace
 
 int MutateMain(int argc, char** argv) {
-  CommandLine::Init(argc, argv);
-  CommandLine* cmd = CommandLine::ForCurrentProcess();
-  CommandLine::StringVector args = cmd->GetArgs();
+  base::CommandLine::Init(argc, argv);
+  base::CommandLine* cmd = base::CommandLine::ForCurrentProcess();
+  base::CommandLine::StringVector args = cmd->GetArgs();
 
   if (args.size() != 2 || cmd->HasSwitch(kHelpSwitch)) {
     usage();
     return EXIT_FAILURE;
   }
 
   std::string input_file_name = args[0];
   std::string output_file_name = args[1];
 
   bool permute = cmd->HasSwitch(kPermuteSwitch);
@@ skipping 49 matching lines @@
     return EXIT_FAILURE;
 
   return EXIT_SUCCESS;
 }
 
 }  // namespace ipc_fuzzer
 
 int main(int argc, char** argv) {
   return ipc_fuzzer::MutateMain(argc, argv);
 }