Overhaul microbenchmark so that it can be pulled in easily by any package

src/platform/microbenchmark/main.cc

 // Copyright (c) 2009 The Chromium OS Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
-// Some portions Copyright (c) 2009 The Chromium Authors.
 
 #include "microbenchmark/microbenchmark.h"
 
 #include <stdlib.h>
 
 int main(int argc, char **argv) {
   CommandLine::Init(argc, argv);
   logging::InitLogging(NULL,
                        logging::LOG_ONLY_TO_SYSTEM_DEBUG_LOG,
                        logging::DONT_LOCK_LOG_FILE,
                        logging::APPEND_TO_OLD_LOG_FILE);
   ::testing::InitGoogleTest(&argc, argv);
   CommandLine *cl = CommandLine::ForCurrentProcess();
   if (cl->GetSwitchValueASCII(chromeos::Microbenchmark::kRunsSwitch).empty()) {
     LOG(INFO) << "Defaulting to the number of runs specified per test";
     LOG(INFO) << "To override, use --"
               << chromeos::Microbenchmark::kRunsSwitch
               << "=NUM";
   }
   return RUN_ALL_TESTS();
 }