[Downloads] Move client guid for AV scanning of downloaded files to chrome/

chrome/browser/download/chrome_download_manager_delegate.cc

Index: chrome/browser/download/chrome_download_manager_delegate.cc
diff --git a/chrome/browser/download/chrome_download_manager_delegate.cc b/chrome/browser/download/chrome_download_manager_delegate.cc
index a810537d239dc78697b327b092c83d9221f5951b..aec10bb340325c4131b2a4c349ce12901072e0ab 100644
--- a/chrome/browser/download/chrome_download_manager_delegate.cc
+++ b/chrome/browser/download/chrome_download_manager_delegate.cc
@@ -34,6 +34,7 @@
 #include "chrome/browser/platform_util.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/safe_browsing/safe_browsing_service.h"
+#include "chrome/common/chrome_constants.h"
 #include "chrome/common/pref_names.h"
 #include "components/user_prefs/pref_registry_syncable.h"
 #include "content/public/browser/download_item.h"
@@ -402,6 +403,11 @@ void ChromeDownloadManagerDelegate::CheckForFileExistence(
       callback);
 }
 
+std::string
+ChromeDownloadManagerDelegate::ApplicationClientIdForFileScanning() const {
+  return std::string(chrome::kApplicationClientIDStringForAVScanning);
+}
+
 DownloadProtectionService*
     ChromeDownloadManagerDelegate::GetDownloadProtectionService() {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));