Linux: use readlink() and prctl() in SetProcTitle() to fix "exe" showing in process listings.

chrome/plugin/plugin_main.cc

Index: chrome/plugin/plugin_main.cc
===================================================================
--- chrome/plugin/plugin_main.cc	(revision 35439)
+++ chrome/plugin/plugin_main.cc	(working copy)
@@ -62,7 +62,12 @@
 
   const CommandLine& parsed_command_line = parameters.command_line_;
 
-#if defined(OS_WIN)
+#if defined(OS_LINUX)
+  // On Linux we exec ourselves from /proc/self/exe, but that makes the
+  // process name that shows up in "ps" etc. for plugins show as "exe"
+  // instead of "chrome" or something reasonable. Try to fix it.
+  CommandLine::SetProcTitle();
+#elif defined(OS_WIN)
   sandbox::TargetServices* target_services =
       parameters.sandbox_info_.TargetServices();