reintroduce InterceptDownloadResourceThrottle for some OMA DRM downloads

chrome/browser/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("//build/split_static_library.gni")
 import("//chrome/common/features.gni")
@@ skipping 2616 matching lines @@
       "android/download/dangerous_download_infobar_delegate.cc",
       "android/download/dangerous_download_infobar_delegate.h",
       "android/download/download_controller.cc",
       "android/download/download_controller.h",
       "android/download/download_controller_base.cc",
       "android/download/download_controller_base.h",
       "android/download/download_manager_service.cc",
       "android/download/download_manager_service.h",
       "android/download/duplicate_download_infobar_delegate.cc",
       "android/download/duplicate_download_infobar_delegate.h",
+      "android/download/intercept_download_resource_throttle.cc",
+      "android/download/intercept_download_resource_throttle.h",
       "android/download/mock_download_controller.cc",
       "android/download/mock_download_controller.h",
       "android/download/ui/thumbnail_provider.cc",
       "android/download/ui/thumbnail_provider.h",
       "android/favicon_helper.cc",
       "android/favicon_helper.h",
       "android/feature_utilities.cc",
       "android/feature_utilities.h",
       "android/feedback/connectivity_checker.cc",
       "android/feedback/connectivity_checker.h",
@@ skipping 1838 matching lines @@
       "media/pepper_cdm_test_constants.cc",
       "media/pepper_cdm_test_constants.h",
     ]
   }
 }
 
 service_manifest("preferences_manifest") {
   name = "preferences"
   source = "prefs/preferences_manifest.json"
 }