Add a new FORCE_DETERMINISTIC_BUILD define.

build/config/BUILD.gn

Index: build/config/BUILD.gn
diff --git a/build/config/BUILD.gn b/build/config/BUILD.gn
index 3fb9c9b1e855e2726ab3b36ea073f72cd0ec3fe8..2fad6d7534bf0d066601dbb7c43fc30c65095e3c 100644
--- a/build/config/BUILD.gn
+++ b/build/config/BUILD.gn
@@ -52,6 +52,9 @@ config("feature_flags") {
   if (cld_version > 0) {
     defines += [ "CLD_VERSION=$cld_version" ]
   }
+  if (deterministic_build) {

[brettw, 2014/06/11 20:26:53]

You need to declare this as an "Arg" like disable_iterator_debugging at the top,
and give it documentation and a default value. As is this will fail to run since
its not defined.

[Sébastien Marchand, 2014/06/11 20:30:33]

Is it ok to define it in BUILDCONFIG.gn ?

+    defines += [ "DETERMINISTIC_BUILD=1" ]

[M-A Ruel, 2014/06/11 20:01:01]

Why do you set it to 1 here and no in common.gypi. An oversight?

[Sébastien Marchand, 2014/06/11 20:25:41]

Because I was scared by GN so I haven't realized that I was setting it
differently... :) (cut&paste error)

+  }
   if (enable_mdns) {
     defines += [ "ENABLE_MDNS=1" ]
   }