Make the outdated build detector disabler load and run on XP.

BUILD.gn

Index: BUILD.gn
diff --git a/BUILD.gn b/BUILD.gn
index fea74333b479825c855f7ed172a494f232314575..764b9bd0429f79a471727b25029abd15ca8bd035 100644
--- a/BUILD.gn
+++ b/BUILD.gn
@@ -111,6 +111,7 @@ if (is_win) {
     ]
 
     if (target_cpu == "x86") {
+      deps += [ "//chrome/tools/disable_outdated_build_detector:disable_outdated_build_detector" ]

[Dirk Pranke, 2016/08/18 17:04:56]

This should just be "//chrome/tools/disable_outdated_build_detector" (the target
name defaults to the directory name if not specified, and that form is preferred
because it's shorter).

[grt (UTC plus 2), 2016/08/18 20:33:08]

Done. Thanks for the clarification. I wasn't sure if the unqualified form mean
"all" or "first" or what. Is this documented in "gn help" somewhere (just
curious)?

       if (is_clang) {
         deps += [ "//courgette(//build/toolchain/win:clang_x64)" ]
       } else {
@@ -357,7 +358,6 @@ group("both_gn_and_gyp") {
     deps += [
       "//chrome/installer/gcapi",
       "//chrome/tools/build/win/syzygy:chrome_dll_syzygy",
-      "//chrome/tools/disable_outdated_build_detector",
     ]
   }
 
@@ -706,6 +706,10 @@ group("gn_only") {
     deps += [ "//components/proximity_auth:proximity_auth_unittests" ]
   }
 
+  if (is_win && target_cpu == "x86") {
+    deps += [ "//chrome/tools/disable_outdated_build_detector" ]
+  }
+
   if (is_win || is_linux) {
     deps += [
       "//mash:all",