POSIX: add command line option to launch renderers in a wrapper

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 96 matching lines @@
                              const std::wstring& value_string);
 
   // Append a loose value to the command line.
   void AppendLooseValue(const std::wstring& value);
 
   // Append the arguments from another command line to this one.
   // If |include_program| is true, include |other|'s program as well.
   void AppendArguments(const CommandLine& other,
                        bool include_program);
 
+  // On POSIX systems it's common to run processes via a wrapper (like
+  // "valgrind" or "gdb --args"). *Note, only availible on POSIX*
+  void PrependWrapper(const std::wstring& wrapper);
+
  private:
   friend class InProcessBrowserTest;
 
   CommandLine() {}
 
   // Used by InProcessBrowserTest.
   static CommandLine* ForCurrentProcessMutable() {
     DCHECK(current_process_commandline_);
     return current_process_commandline_;
   }
@@ skipping 39 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_