Use gold and the bundled binutils on x86 by default

build/config/compiler/compiler.gni

 # Copyright 2015 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/android/config.gni")
 import("//build/config/chrome_build.gni")
 import("//build/config/chromecast_build.gni")
 import("//build/config/sanitizers/sanitizers.gni")
 import("//build/toolchain/toolchain.gni")
 
@@ skipping 17 matching lines @@
   #     2 : Used during the PGO (optimization) phase.
   #
   # TODO(sebmarchand): Add support for the PGU (update) phase.
   chrome_pgo_phase = 0
 
   # Whether or not the official builds should be build with full WPO.
   full_wpo_on_official = false
 }
 
 declare_args() {
-  # TODO: We should be using 64-bit gold for linking on both 64-bit Linux
-  # and 32-bit linux; 32-bit Gold runs out of address-space on 32-bit builds.
-  # However, something isn't quite working right on the 32-bit builds.
   use_gold = !use_lld &&
-             ((is_linux && (current_cpu == "x64" || current_cpu == "arm")) ||
+             ((is_linux && (current_cpu == "x64" || current_cpu == "x86" ||
+                            current_cpu == "arm")) ||
               (is_android && (current_cpu == "x86" || current_cpu == "x64" ||
                               current_cpu == "arm")))
 }
 
 # If it wasn't manually set, set to an appropriate default.
 assert(symbol_level >= -1 && symbol_level <= 2, "Invalid symbol_level")
 if (symbol_level == -1) {
   if (is_android && use_order_profiling) {
     # With instrumentation enabled, debug info puts libchrome.so over 4gb, which
     # causes the linker to produce an invalid ELF. http://crbug.com/574476
@@ skipping 12 matching lines @@
     symbol_level = 1
   } else {
     symbol_level = 0
   }
 }
 
 # PGO requires full WPO.
 if (chrome_pgo_phase > 0) {
   full_wpo_on_official = true
 }