Revert 113027 - Zygote most of the uses of the utility process on Linux

content/browser/utility_process_host.h

Index: content/browser/utility_process_host.h
===================================================================
--- content/browser/utility_process_host.h	(revision 113164)
+++ content/browser/utility_process_host.h	(working copy)
@@ -66,8 +66,6 @@
   void set_exposed_dir(const FilePath& dir) { exposed_dir_ = dir; }
   void set_no_sandbox(bool flag) { no_sandbox_ = flag; }
   void set_child_flags(int flags) { child_flags_ = flags; }
-  void set_use_linux_zygote(bool flag) { use_linux_zygote_ = flag; }
-
 #if defined(OS_POSIX)
   void set_env(const base::environment_vector& env) { env_ = env; }
 #endif
@@ -106,12 +104,6 @@
 
   base::environment_vector env_;
 
-  // If the |no_sandbox_| flag is off, and we are on Linux, launch the
-  // utility process from the zygote. Defaults to true on Linux, and to
-  // false on all other platforms.
-  // Can only be used for tasks that do not require FS access.
-  bool use_linux_zygote_;
-
   bool started_;
 
   DISALLOW_COPY_AND_ASSIGN(UtilityProcessHost);