Make webkit_modules a split static library in non-component builds.

third_party/WebKit/Source/modules/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("//build/split_static_library.gni")
 import("//third_party/WebKit/Source/bindings/bindings.gni")
 import("//third_party/WebKit/Source/bindings/modules/v8/generated.gni")
 import("//third_party/WebKit/Source/bindings/modules/v8/v8.gni")
 import("//third_party/WebKit/Source/build/scripts/scripts.gni")
 import("//third_party/WebKit/Source/modules/modules.gni")
 
 visibility = [ "//third_party/WebKit/Source/*" ]
 
-# GYP version: WebKit/Source/modules/modules.gyp:modules
-component("modules") {
+if (!is_component_build && is_win && is_official_build) {
+  # This target as a static library (for non-component builds) is >2GB for
+  # official builds on Windows. This causes linking fail. As a workaround,
+  # force using a split static library for this configuration.
+  modules_target_type = "split_static_library"
+} else {
+  modules_target_type = "component"
+}
+
+target(modules_target_type, "modules") {
   output_name = "blink_modules"
 
-  if (is_win && is_official_build) {
-    # This target is >2GB for official builds on Windows which causes linking
-    # with the library to fail. As a workaround, force using a source set in
-    # this configuration whcih avoids generating the .lib file (although will
-    # cause slower links).
-    static_component_type = "source_set"
+  if (modules_target_type == "split_static_library") {
+    split_count = 5
   }
 
   visibility = []  # Allow re-assignment of list.
   visibility = [ "//third_party/WebKit/*" ]
 
   sources = rebase_path(modules_files, ".", "//")
   sources += bindings_modules_v8_files
   sources += rebase_path(bindings_modules_generated_aggregate_files, ".", "//")
   sources += rebase_path(bindings_modules_generated_union_type_files, ".", "//")
   sources +=
@@ skipping 84 matching lines @@
 }
 
 # GYP version: WebKit/Source/modules/modules_generated.gyp:make_modules_generated
 group("make_modules_generated") {
   public_deps = [
     ":module_names",
     "//third_party/WebKit/Source/bindings/modules:bindings_modules_generated",
     "//third_party/WebKit/Source/core:core_event_interfaces",
   ]
 }