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

chrome/browser/renderer_host/browser_render_process_host.cc

 // Copyright (c) 2006-2009 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.
 
 // Represents the browser side of the browser <--> renderer communication
 // channel. There will be one RenderProcessHost per renderer process.
 
 #include "chrome/browser/renderer_host/browser_render_process_host.h"
 
 #include "build/build_config.h"
@@ skipping 282 matching lines @@
   if (renderer_path.empty()) {
     // Need to reset the channel we created above or others might think the
     // connection is live.
     channel_.reset();
     return false;
   }
   CommandLine cmd_line(renderer_path);
   if (logging::DialogsAreSuppressed())
     cmd_line.AppendSwitch(switches::kNoErrorDialogs);
 
-  // propagate the following switches to the renderer command line
-  // (along with any associated values) if present in the browser command line
+  // Pass the process type first, so it shows first in process listings.
+  cmd_line.AppendSwitchWithValue(switches::kProcessType,
+                                 switches::kRendererProcess);
+
+  // Propagate the following switches to the renderer command line (along
+  // with any associated values) if present in the browser command line.
   static const wchar_t* const switch_names[] = {
     switches::kRendererAssertTest,
     switches::kRendererCrashTest,
     switches::kRendererStartupDialog,
     switches::kNoSandbox,
     switches::kTestSandbox,
     switches::kEnableSeccompSandbox,
 #if !defined (GOOGLE_CHROME_BUILD)
     // This is an unsupported and not fully tested mode, so don't enable it for
     // official Chrome builds.
@@ skipping 50 matching lines @@
   const bool has_cmd_prefix =
       browser_command_line.HasSwitch(switches::kRendererCmdPrefix);
   if (has_cmd_prefix) {
     // launch the renderer child with some prefix (usually "gdb --args")
     const std::wstring prefix =
         browser_command_line.GetSwitchValue(switches::kRendererCmdPrefix);
     cmd_line.PrependWrapper(prefix);
   }
 #endif  // OS_POSIX
 
-  cmd_line.AppendSwitchWithValue(switches::kProcessType,
-                                 switches::kRendererProcess);
-
   cmd_line.AppendSwitchWithValue(switches::kProcessChannelID,
                                  ASCIIToWide(channel_id));
 
   ChildProcessHost::SetCrashReporterCommandLine(&cmd_line);
 
   const std::wstring& profile_path =
       browser_command_line.GetSwitchValue(switches::kUserDataDir);
   if (!profile_path.empty())
     cmd_line.AppendSwitchWithValue(switches::kUserDataDir,
                                    profile_path);
@@ skipping 570 matching lines @@
     profile()->GetExtensionMessageService()->RemoveEventListener(
         event_name, id());
   }
 }
 
 void BrowserRenderProcessHost::OnExtensionCloseChannel(int port_id) {
   if (profile()->GetExtensionMessageService()) {
     profile()->GetExtensionMessageService()->CloseChannel(port_id);
   }
 }