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

chrome/browser/zygote_main_linux.cc

 // Copyright (c) 2009 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 <dlfcn.h>
 #include <unistd.h>
 #include <sys/epoll.h>
 #include <sys/types.h>
 #include <sys/socket.h>
 #include <sys/signal.h>
@@ skipping 169 matching lines @@
     mapping.push_back(std::make_pair(
         static_cast<uint32_t>(kSandboxIPCChannel), 5));
 
     child = fork();
 
     if (!child) {
       close(3);  // our socket from the browser is in fd 3
       Singleton<base::GlobalDescriptors>()->Reset(mapping);
       CommandLine::Reset();
       CommandLine::Init(args);
+      CommandLine::SetProcTitle();
       return true;
     }
 
     for (std::vector<int>::const_iterator
          i = fds.begin(); i != fds.end(); ++i)
       close(*i);
 
     HANDLE_EINTR(write(fd, &child, sizeof(child)));
     return false;
 
@@ skipping 243 matching lines @@
 
   if (!MaybeEnterChroot()) {
     LOG(FATAL) << "Failed to enter sandbox. Fail safe abort. (errno: "
                << errno << ")";
     return false;
   }
 
   Zygote zygote;
   return zygote.ProcessRequests();
 }