Move v8 snapshot renaming code to v8/BUILD.gn

build_overrides/v8.gni

 # Copyright 2015 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.
 
 if (is_android) {
   import("//build/config/android/config.gni")
 }
 
 # TODO(sky): nuke this. Temporary while sorting out http://crbug.com/465456.
 enable_correct_v8_arch = false
 
 v8_use_external_startup_data = !is_ios
 
 # Turns on compiler optimizations in V8 in Debug build.
 v8_optimized_debug = true
 
 # V8 extras
 # Adding V8 extras files requires API owners review
 # Be sure to synchronize with build/common.gypi
 
 v8_extra_library_files = [
   "../third_party/WebKit/Source/core/streams/ByteLengthQueuingStrategy.js",
   "../third_party/WebKit/Source/core/streams/CountQueuingStrategy.js",
   "../third_party/WebKit/Source/core/streams/ReadableStream.js",
 ]
 v8_experimental_extra_library_files = []
-
-if (is_android) {
-  v8_external_startup_data_renaming_sources = [
-    "$root_out_dir/natives_blob.bin",
-    "$root_out_dir/snapshot_blob.bin",
-  ]
-  if (current_cpu == "arm" || current_cpu == "x86" || current_cpu == "mipsel") {
-    v8_external_startup_data_renaming_destinations = [
-      "natives_blob.bin",
-      "snapshot_blob_32.bin",
-    ]
-  } else {
-    v8_external_startup_data_renaming_destinations = [
-      "natives_blob.bin",
-      "snapshot_blob_64.bin",
-    ]
-  }
-}