Stop compiling dead download infobar code on desktop Chrome

chrome/test/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/chrome_build.gni")
 import("//build/config/crypto.gni")
 import("//build/config/features.gni")
 import("//build/config/ui.gni")
 import("//chrome/chrome_tests.gni")
 import("//chrome/test/base/js2gtest.gni")
@@ skipping 1467 matching lines @@
       # Some android targets still depend on --gc-sections to link.
       # TODO: remove --gc-sections for Debug builds (crbug.com/159847).
       ldflags = [ "-Wl,--gc-sections" ]
       deps += [ "//testing/android/native_test:native_test_native_code" ]
       isolate_file = "../unit_tests.isolate"
     } else {
       sources += rebase_path(
               chrome_tests_unit_gypi_values.chrome_unit_tests_non_android_sources,
               ".",
               "//chrome")
+      sources -= [ "../browser/download/download_request_infobar_delegate_unittest.cc" ]
     }
     if (is_ios || is_chromeos) {
       sources -=
           [ "../browser/metrics/signin_status_metrics_provider_unittest.cc" ]
     }
     if (enable_background) {
       sources += rebase_path(
               chrome_tests_unit_gypi_values.chrome_unit_tests_background_sources,
               ".",
               "//chrome")
@@ skipping 510 matching lines @@
     "//third_party/mojo/src/mojo/edk/system",
   ]
 
   if (!is_android && use_ash) {
     sources += rebase_path(
             chrome_tests_unit_gypi_values.chrome_test_support_unit_ash_sources,
             ".",
             "//chrome")
   }
 }