Windows precompiled header support in GN

base/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/ui.gni")
 import("//testing/test.gni")
 
 if (is_android) {
   import("//build/config/android/rules.gni")
 }
@@ skipping 32 matching lines @@
     sources -= [ "base_paths_posix.cc" ]
   }
 
   if (is_nacl) {
     sources -= [
       "base_paths.cc",
       "base_paths_posix.cc",
     ]
   }
 
-  configs += [ ":base_implementation" ]
+  configs += [ ":base_implementation", "//build/config:precompiled_headers" ]
 
   deps = [
     "//base/memory",
     "//base/process",
   ]
 
   visibility = [ ":base" ]
 }
 
 component("base") {
@@ skipping 1500 matching lines @@
 
   # GYP: //base.gyp:base_java_unittest_support
   android_library("base_java_unittest_support") {
     deps = [
       ":base_java",
     ]
     java_files =
         [ "test/android/java/src/org/chromium/base/ContentUriTestUtils.java" ]
   }
 }