Add a new FORCE_DETERMINISTIC_BUILD define.

build/config/BUILD.gn

 # Copyright (c) 2013 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.
 
 import("//build/config/allocator.gni")
 import("//build/config/crypto.gni")
 import("//build/config/features.gni")
 import("//build/config/ui.gni")
 
 declare_args() {
@@ skipping 34 matching lines @@
       "ENABLE_SERVICE_DISCOVERY=1",
       "USE_MOJO=1",
       "V8_DEPRECATION_WARNINGS",  # Don't use deprecated V8 APIs anywhere.
       # Temporary suppression until Blink code can be removed.
       "BLINK_SCALE_FILTERS_AT_RECORD_TIME",
   ]
 
   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" ]
   }
   if (enable_pepper_cdms) {
     # TODO(brettw) should probably be "=1"
     defines += [ "ENABLE_PEPPER_CDMS" ]
   }
   if (enable_plugins) {
     defines += [ "ENABLE_PLUGINS=1" ]
   }
@@ skipping 160 matching lines @@
       "CoreText.framework",
       "Foundation.framework",
       "UIKit.framework",
     ]
   } else if (is_linux) {
     libs = [
       "dl",
     ]
   }
 }