Add precompiled headers to GN build for large targets.

chrome/common/BUILD.gn

 # Copyright 2014 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("//tools/grit/grit_rule.gni")
 import("//third_party/mojo/src/mojo/public/tools/bindings/mojom.gni")
 
 gypi_values = exec_script("//build/gypi_to_gn.py",
                           [ rebase_path("../chrome_common.gypi") ],
                           "scope",
@@ skipping 22 matching lines @@
       "extensions_api_resources.pak",
     ]
   }
 }
 
 # GYP version: chrome/chrome_common.gyp:common
 static_library("common") {
   sources = rebase_path(gypi_values.chrome_common_sources, ".", "//chrome")
   defines = []
 
-  configs += [ "//build/config/compiler:wexit_time_destructors" ]
+  configs += [
+    "//build/config:precompiled_headers",
+    "//build/config/compiler:wexit_time_destructors",
+  ]
 
   public_deps = [
     "//chrome/common:constants",
     "//chrome/common/net",
     "//chrome/common/safe_browsing:proto",
   ]
   deps = [
     ":version",
     "//base:base",
     "//base:i18n",
@@ skipping 302 matching lines @@
     ":constants",
     "//base",
   ]
 }
 
 mojom("mojo_bindings") {
   sources = [
     "resource_usage_reporter.mojom",
   ]
 }