Linux: set the process title (that shows in "ps" etc.) of renderers correctly when using the zygote.

base/command_line.h

 // Copyright (c) 2006-2008 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 class works with command lines: building and parsing.
 // Switches can optionally have a value attached using an equals sign,
 // as in "-switch=value".  Arguments that aren't prefixed with a
 // switch prefix are considered "loose parameters".  Switch names are
 // case-insensitive.  An argument of "--" will terminate switch
 // parsing, causing everything after to be considered as loose
@@ skipping 37 matching lines @@
   // Uninit and free the current process's command line.
   static void Reset();
 
   // Initialize the current process CommandLine singleton.  On Windows,
   // ignores its arguments (we instead parse GetCommandLineW()
   // directly) because we don't trust the CRT's parsing of the command
   // line, but it still must be called to set up the command line.
   static void Init(int argc, const char* const* argv);
   static void Init(const std::vector<std::string>& argv);
 
+#if defined(OS_LINUX) || defined(OS_FREEBSD)
+  // Sets the current process' arguments that show in "ps" etc. to those
+  // in |current_process_commandline_|. Used by the zygote host so that
+  // renderers show up with --type=renderer.
+  static void SetProcTitle();
+
+  // Needed to support SetProcTitle() on Linux. Should be called by main().
+  static void SetTrueArgv(char** argv);
+#endif
+
   // Destroys the current process CommandLine singleton. This is necessary if
   // you want to reset the base library to its initial state (for example in an
   // outer library that needs to be able to terminate, and be re-initialized).
   // If Init is called only once, e.g. in main(), calling Terminate() is not
   // necessary.
   static void Terminate();
 
   // Get the singleton CommandLine representing the current process's
   // command line.
   static const CommandLine* ForCurrentProcess() {
@@ skipping 115 matching lines @@
   std::vector<StringType> loose_values_;
 
   // We allow copy constructors, because a common pattern is to grab a
   // copy of the current process's command line and then add some
   // flags to it.  E.g.:
   //   CommandLine cl(*CommandLine::ForCurrentProcess());
   //   cl.AppendSwitch(...);
 };
 
 #endif  // BASE_COMMAND_LINE_H_