Add GN "resources" target for blink_resources GYP target.

I need this to be able to remove blink_common_resources from Chromium.

BUG=338338
TEST=None
R=brettw@chromium.org,
TBR=abarth@chromium.org

Review URL: https://codereview.chromium.org/424503002

git-svn-id: svn://svn.chromium.org/blink/trunk@179053 bbb929c8-8fbe-4397-9dbb-9b2b20218538

third_party/WebKit/public/BUILD.gn

@@ -2,6 +2,8 @@
 # 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")
+
 if (!is_android) {
 
 # GYP version: WebKit/public/blink.gyp:blink
@@ -73,3 +75,12 @@ group("blink_generate_devtools_grd") {
     "//third_party/WebKit/Source/devtools:generate_devtools_grd",
   ]
 }
+
+grit("resources") {
+  source = "blink_resources.grd"
+  outputs = [
+    "grit/blink_resources.h",
+    "blink_resources.rc",
+    "blink_resources.pak",
+  ]
+}