Enable precompiled headers for Blink on Windows

third_party/WebKit/Source/modules/BUILD.gn

Index: third_party/WebKit/Source/modules/BUILD.gn
diff --git a/third_party/WebKit/Source/modules/BUILD.gn b/third_party/WebKit/Source/modules/BUILD.gn
index 56991f6b8fd18f3b76217dd501154a266db72ef8..18005803f6d867c1c05d076ef104380528766374 100644
--- a/third_party/WebKit/Source/modules/BUILD.gn
+++ b/third_party/WebKit/Source/modules/BUILD.gn
@@ -1,6 +1,6 @@
 # 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.
+# found in the LICENSE file.
 
 import("//third_party/WebKit/Source/bindings/bindings.gni")
 import("//third_party/WebKit/Source/bindings/modules/v8/generated.gni")
@@ -49,6 +49,7 @@ component("modules") {
     "//third_party/WebKit/Source:config",
     "//third_party/WebKit/Source:non_test_config",
     "//third_party/WebKit/Source:inside_blink",
+    "//third_party/WebKit/Source/core:blink_core_pch",
   ]
 
   defines = [ "BLINK_MODULES_IMPLEMENTATION=1" ]
@@ -91,6 +92,7 @@ source_set("modules_testing") {
   configs += [
     "//third_party/WebKit/Source:config",
     "//third_party/WebKit/Source:inside_blink",
+    "//third_party/WebKit/Source/core:blink_core_pch",
   ]
 
   deps = [