[gn] Refactoring - inverse libplatform config dependency

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/config/android/config.gni")
 import("//build/config/arm.gni")
 import("//build/config/mips.gni")
 import("//build/config/sanitizers/sanitizers.gni")
 
 if (is_android) {
@@ skipping 1942 matching lines @@
     "src/libplatform/task-queue.cc",
     "src/libplatform/task-queue.h",
     "src/libplatform/worker-thread.cc",
     "src/libplatform/worker-thread.h",
   ]
 
   configs = [
     ":internal_config_base",
   ]
 
+  public_configs = [
+    ":libplatform_config"
+  ]
+
   deps = [
     ":v8_libbase",
   ]
 }
 
 v8_source_set("fuzzer_support") {
   visibility = [ ":*" ]  # Only targets in this file can depend on this.
 
   sources = [
     "test/fuzzer/fuzzer-support.cc",
     "test/fuzzer/fuzzer-support.h",
   ]
 
   configs = [
     ":internal_config_base",
-    ":libplatform_config",
   ]
 
   deps = [
+    snapshot_target,
+  ]
+
+  public_deps = [
     ":v8_libplatform",
-    snapshot_target,
   ]
 }
 
 ###############################################################################
 # Executables
 #
 
 if (current_toolchain == snapshot_toolchain) {
   executable("mksnapshot") {
     visibility = [ ":*" ]  # Only targets in this file can depend on this.
 
     sources = [
       "src/snapshot/mksnapshot.cc",
     ]
 
     configs -= [ "//build/config/compiler:chromium_code" ]
     configs += [ "//build/config/compiler:no_chromium_code" ]
     configs += [
       ":internal_config",
-      ":libplatform_config",
       ":features",
       ":toolchain",
     ]
 
     deps = [
       ":v8_base",
       ":v8_libplatform",
       ":v8_nosnapshot",
       "//build/config/sanitizers:deps",
       "//build/win:default_exe_manifest",
@@ skipping 120 matching lines @@
   sources = [
     "test/fuzzer/json.cc",
   ]
 
   deps = [
     ":fuzzer_support",
   ]
 
   configs = [
     ":internal_config",
-    ":libplatform_config",
   ]
 }
 
 v8_source_set("parser_fuzzer") {
   sources = [
     "test/fuzzer/parser.cc",
   ]
 
   deps = [
     ":fuzzer_support",
   ]
 
   configs = [
     ":internal_config",
-    ":libplatform_config",
   ]
 }
 
 v8_source_set("regexp_fuzzer") {
   sources = [
     "test/fuzzer/regexp.cc",
   ]
 
   deps = [
     ":fuzzer_support",
   ]
 
   configs = [
     ":internal_config",
-    ":libplatform_config",
   ]
 }
 
 v8_source_set("wasm_fuzzer") {
   sources = [
     "test/fuzzer/wasm.cc",
   ]
 
   deps = [
     ":fuzzer_support",
   ]
 
   configs = [
     ":internal_config",
-    ":libplatform_config",
   ]
 }
 
 v8_source_set("wasm_asmjs_fuzzer") {
   sources = [
     "test/fuzzer/wasm-asmjs.cc",
   ]
 
   deps = [
     ":fuzzer_support",
   ]
 
   configs = [
     ":internal_config",
-    ":libplatform_config",
   ]
 }