Don't even include v8.h from libbase or libplatform

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.
 
 # TODO(jochen): These will need to be user-settable to support standalone V8
 # builds.
 v8_compress_startup_data = "off"
 v8_deprecation_warnings = false
 v8_enable_disassembler = false
 v8_enable_gdbjit = false
@@ skipping 19 matching lines @@
   include_dirs = [ "." ]
 
   if (component_mode == "shared_library") {
     defines = [
       "V8_SHARED",
       "BUILDING_V8_SHARED",
     ]
   }
 }
 
+config("internal_config_base") {
+  visibility = ":*"  # Only targets in this file can depend on this.
+
+  include_dirs = [ "." ]
+}
+
 # This config should only be applied to code using V8 and not any V8 code
 # itself.
 config("external_config") {
   if (is_component_build) {
     defines = [
       "V8_SHARED",
       "USING_V8_SHARED",
     ]
   }
   include_dirs = [ "include" ]
@@ skipping 957 matching lines @@
     "src/base/safe_conversions.h",
     "src/base/safe_conversions_impl.h",
     "src/base/safe_math.h",
     "src/base/safe_math_impl.h",
     "src/base/utils/random-number-generator.cc",
     "src/base/utils/random-number-generator.h",
   ]
 
   configs -= [ "//build/config/compiler:chromium_code" ]
   configs += [ "//build/config/compiler:no_chromium_code" ]
-  configs += [ ":internal_config", ":features", ":toolchain" ]
+  configs += [ ":internal_config_base", ":features", ":toolchain" ]
 
   defines = []
 
   if (is_posix) {
     sources += [
       "src/base/platform/platform-posix.cc"
     ]
   }
 
   if (is_linux) {
@@ skipping 42 matching lines @@
     "src/libplatform/default-platform.cc",
     "src/libplatform/default-platform.h",
     "src/libplatform/task-queue.cc",
     "src/libplatform/task-queue.h",
     "src/libplatform/worker-thread.cc",
     "src/libplatform/worker-thread.h",
   ]
 
   configs -= [ "//build/config/compiler:chromium_code" ]
   configs += [ "//build/config/compiler:no_chromium_code" ]
-  configs += [ ":internal_config", ":features", ":toolchain" ]
+  configs += [ ":internal_config_base", ":features", ":toolchain" ]
 
   deps = [
     ":v8_libbase",
   ]
 }
 
 ###############################################################################
 # Executables
 #
 
@@ skipping 77 matching lines @@
     deps = [
       ":v8_base",
       ":v8_nosnapshot",
     ]
   }
 
   direct_dependent_configs = [ ":external_config" ]
 }
 
 }