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

media/cast/test/cast_benchmarks.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.
 //
 // This program benchmarks the theoretical throughput of the cast library.
 // It runs using a fake clock, simulated network and fake codecs. This allows
 // tests to run much faster than real time.
 // To run the program, run:
 // $ ./out/Release/cast_benchmarks | tee benchmarkoutput.asc
 // This may take a while, when it is done, you can view the data with
@@ skipping 680 matching lines @@
   void Run() {
     // Spanning search.
 
     std::vector<linked_ptr<base::Thread> > threads;
     for (int i = 0; i < 16; i++) {
       threads.push_back(make_linked_ptr(new base::Thread(
           base::StringPrintf("cast_bench_thread_%d", i))));
       threads[i]->Start();
     }
 
-    if (CommandLine::ForCurrentProcess()->HasSwitch("single-run")) {
+    if (base::CommandLine::ForCurrentProcess()->HasSwitch("single-run")) {
       SearchVector a;
       a.bitrate.base = 100.0;
       a.bitrate.grade = 1.0;
       a.latency.grade = 1.0;
       a.packet_drop.grade = 1.0;
       threads[0]->message_loop()->PostTask(
           FROM_HERE,
           base::Bind(base::IgnoreResult(&CastBenchmark::RunOnePoint),
                      base::Unretained(this),
                      a,
@@ skipping 24 matching lines @@
  private:
   BenchmarkCache<MeasuringPoint> cache_;
   base::Lock lock_;
 };
 
 }  // namespace cast
 }  // namespace media
 
 int main(int argc, char** argv) {
   base::AtExitManager at_exit;
-  CommandLine::Init(argc, argv);
+  base::CommandLine::Init(argc, argv);
   media::cast::CastBenchmark benchmark;
   if (getenv("PROFILE_FILE")) {
     std::string profile_file(getenv("PROFILE_FILE"));
     base::debug::StartProfiling(profile_file);
     benchmark.Run();
     base::debug::StopProfiling();
   } else {
     benchmark.Run();
   }
 }