Link Blink into the browser process less.

third_party/WebKit/public/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("//third_party/WebKit/Source/config.gni")
 import("//tools/grit/grit_rule.gni")
 
 blink_headers_values = exec_script("//build/gypi_to_gn.py",
                                    [ rebase_path("blink_headers.gypi") ],
                                    "scope",
@@ skipping 52 matching lines @@
     public_deps -= [
       "//third_party/WebKit/Source/platform:blink_heap_unittests",
       "//third_party/WebKit/Source/platform:blink_platform_unittests",
       "//third_party/WebKit/Source/web:webkit_unit_tests",
     ]
   }
 }
 
 config("blink_headers_config") {
   include_dirs = [ ".." ]
+
+  # Allow :blink_headers to include v8.h without linking to it.
+  configs = [ "//v8:external_config" ]
 }
 
 config("debug_devtools") {
   if (debug_devtools) {
     defines = [ "DEBUG_DEVTOOLS=1" ]
   }
 }
 
 if (is_android) {
   # GYP version: WebKit/public/blink_headers.gyp:web_input_event_java
@@ skipping 62 matching lines @@
 grit("image_resources") {
   output_dir = "$root_gen_dir/blink/public/resources"
   use_qualified_include = true
   source = "blink_image_resources.grd"
   outputs = [
     "grit/blink_image_resources.h",
     "blink_image_resources_100_percent.pak",
     "blink_image_resources_200_percent.pak",
   ]
 }