win/clang/x86: Use clang for 64-bit part of cloudprint.

cloud_print/BUILD.gn

 # 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.
 
 import("//testing/test.gni")
 
 group("cloud_print") {
   if (is_win) {
     public_deps = [
       "//cloud_print/virtual_driver/win/install:virtual_driver_setup",
       "//cloud_print/virtual_driver/win/port_monitor",
     ]
 
     # When compiling 32-bit, also reference the 64-bit driver for installing on
     # 64-bit systems.
     if (target_cpu == "x86" && current_cpu == "x86") {
-      public_deps += [ "//cloud_print/virtual_driver/win/port_monitor(//build/toolchain/win:x64)" ]
+      if (is_clang) {
+        win64 = "//build/toolchain/win:clang_x64"
+      } else {
+        win64 = "//build/toolchain/win:x64"
+      }
+      public_deps += [ "//cloud_print/virtual_driver/win/port_monitor($win64)" ]
     }
   }
 }
 
 test("cloud_print_unittests") {
   sources = [
     "virtual_driver/win/port_monitor/port_monitor_unittest.cc",
   ]
 
   deps = [
     "//base",
     "//base/test:run_all_unittests",
     "//cloud_print/virtual_driver/win/port_monitor:lib",
     "//testing/gmock",
     "//testing/gtest",
   ]
 
   libs = [ "secur32.lib" ]
 }