reintroduce InterceptDownloadResourceThrottle for some OMA DRM downloads

chrome/browser/android/download/mock_download_controller.cc

Index: chrome/browser/android/download/mock_download_controller.cc
diff --git a/chrome/browser/android/download/mock_download_controller.cc b/chrome/browser/android/download/mock_download_controller.cc
index 1df9ec8b0fdd24d08250ae85bdf02bf5bcd2083b..6b2110320ef4d3863b5666d5718345f7abc580d6 100644
--- a/chrome/browser/android/download/mock_download_controller.cc
+++ b/chrome/browser/android/download/mock_download_controller.cc
@@ -39,5 +39,9 @@ void MockDownloadController::SetApproveFileAccessRequestForTesting(
   approve_file_access_request_ = approve;
 }
 
+void MockDownloadController::CreateGETDownload(
+    const content::ResourceRequestInfo::WebContentsGetter& wc_getter,
+    const DownloadInfo& info) {}
+
 }  // namespace android
 }  // namespace chrome