Allow callers of CommandLine::Init to know whether they were the first caller.

base/command_line.cc

 // Copyright (c) 2011 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 "base/command_line.h"
 
 #include <algorithm>
 #include <ostream>
 
 #include "base/basictypes.h"
@@ skipping 149 matching lines @@
 CommandLine::CommandLine(const StringVector& argv)
     : argv_(1),
       begin_args_(1) {
   InitFromArgv(argv);
 }
 
 CommandLine::~CommandLine() {
 }
 
 // static
-void CommandLine::Init(int argc, const char* const* argv) {
+bool CommandLine::Init(int argc, const char* const* argv) {
   if (current_process_commandline_) {
     // If this is intentional, Reset() must be called first. If we are using
     // the shared build mode, we have to share a single object across multiple
     // shared libraries.
-    return;
+    return false;
   }
 
   current_process_commandline_ = new CommandLine(NO_PROGRAM);
 #if defined(OS_WIN)
   current_process_commandline_->ParseFromString(::GetCommandLineW());
 #elif defined(OS_POSIX)
   current_process_commandline_->InitFromArgv(argc, argv);
 #endif
+
+  return true;
 }
 
 // static
 void CommandLine::Reset() {
   DCHECK(current_process_commandline_);
   delete current_process_commandline_;
   current_process_commandline_ = NULL;
 }
 
 // static
@@ skipping 199 matching lines @@
   int num_args = 0;
   wchar_t** args = NULL;
   args = ::CommandLineToArgvW(command_line_string.c_str(), &num_args);
 
   DPLOG_IF(FATAL, !args) << "CommandLineToArgvW failed on command line: "
                          << command_line;
   InitFromArgv(num_args, args);
   LocalFree(args);
 }
 #endif