Fix v8_current_cpu setting for CrOS builds after r410853.

build/toolchain/cros/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/compiler/compiler.gni")
 import("//build/config/sysroot.gni")
 import("//build/toolchain/gcc_toolchain.gni")
 import("//build/toolchain/cros_toolchain.gni")
 
 template("cros_target_toolchain") {
@@ skipping 104 matching lines @@
   extra_ldflags = cros_v8_snapshot_extra_ldflags
 
   toolchain_args = {
     cc_wrapper = ""
     is_clang = cros_v8_snapshot_is_clang
     if (target_cpu == "x86" || target_cpu == "arm" || target_cpu == "mipsel") {
       current_cpu = "x86"
     } else {
       current_cpu = "x64"
     }
-    v8_toolchain_cpu = v8_target_cpu
+    v8_current_cpu = v8_target_cpu
     current_os = "linux"
     use_sysroot = false
   }
 }