Share field trial allocator on zygote-using Linuxes

content/browser/child_process_launcher.cc

Index: content/browser/child_process_launcher.cc
diff --git a/content/browser/child_process_launcher.cc b/content/browser/child_process_launcher.cc
index c90475f8576e6b4afd2e2595f6f5c18542c733fe..3809ab542f21b7157133540e5e06df1a6a7df5cd 100644
--- a/content/browser/child_process_launcher.cc
+++ b/content/browser/child_process_launcher.cc
@@ -164,6 +164,9 @@ void LaunchOnLauncherThread(const NotifyCallback& callback,
   base::ScopedFD mojo_fd(client_handle.release().handle);
   DCHECK(mojo_fd.is_valid());
 
+  int field_trial_handle = base::FieldTrialList::GetFieldTrialHandle();
+  if (field_trial_handle != -1)

[Alexei Svitkine (slow), 2016/11/24 18:23:19]

Check for the constant.

[lawrencewu, 2016/11/24 18:48:59]

Done.

+    files_to_register->Share(field_trial_handle, field_trial_handle);
 #if defined(OS_ANDROID)
   files_to_register->Share(kMojoIPCChannel, mojo_fd.get());
 #else