Make goma work for the GN build on linux.

build/toolchain/goma.gni

 # 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.
 
 # Defines the configuration of Goma.
 #
 # This is currently designed to match the GYP build exactly, so as not to break
 # people during the transition.
 
 declare_args() {
   # Set to true to enable distributed compilation using Goma.
   use_goma = false
 
   # Set the default value based on the platform.
   if (is_win) {
     # Absolute directory containing the Goma source code.
     goma_dir = "C:\goma\goma-win"
   } else {
     # Absolute directory containing the Goma source code.
     goma_dir = getenv("HOME") + "/goma"
   }
 }
-
-if (use_goma) {
-  # Define the toolchain for the GYP build when using goma.
-  make_goma_global_settings =
-    "['CC_wrapper', '$goma_dir/gomacc']," +
-    "['CXX_wrapper', '$goma_dir/gomacc']," +
-    "['CC.host_wrapper', '$goma_dir/gomacc']," +
-    "['CXX.host_wrapper', '$goma_dir/gomacc'],"
-}

[Dirk Pranke, 2014/07/17 01:18:27]

I believe this was only used by the GN/GYP hybrid build, which we no longer
really support, so this is safe to be deleted. Correct me if I'm wrong ...

[brettw, 2014/07/17 04:37:30]

Correct.