Add ExtensionManagement based ExternalLoader

chrome/browser/extensions/install_verifier.cc

Index: chrome/browser/extensions/install_verifier.cc
diff --git a/chrome/browser/extensions/install_verifier.cc b/chrome/browser/extensions/install_verifier.cc
index 7ef862fec0bf7e3e6b92c2be703fd136a5477288..d9cbee6ca88885358268c582bff539657e544a3d 100644
--- a/chrome/browser/extensions/install_verifier.cc
+++ b/chrome/browser/extensions/install_verifier.cc
@@ -13,6 +13,7 @@
 #include "base/metrics/histogram.h"
 #include "base/prefs/pref_service.h"
 #include "base/stl_util.h"
+#include "chrome/browser/extensions/extension_management.h"
 #include "chrome/browser/extensions/extension_service.h"
 #include "chrome/browser/extensions/install_signer.h"
 #include "chrome/common/chrome_switches.h"
@@ -322,21 +323,8 @@ void InstallVerifier::RemoveMany(const ExtensionIdSet& ids) {
 }
 
 bool InstallVerifier::AllowedByEnterprisePolicy(const std::string& id) const {
-  PrefService* pref_service = prefs_->pref_service();
-  if (pref_service->IsManagedPreference(pref_names::kInstallAllowList)) {
-    const base::ListValue* whitelist =
-        pref_service->GetList(pref_names::kInstallAllowList);
-    base::StringValue id_value(id);
-    if (whitelist && whitelist->Find(id_value) != whitelist->end())
-      return true;
-  }
-  if (pref_service->IsManagedPreference(pref_names::kInstallForceList)) {
-    const base::DictionaryValue* forcelist =
-        pref_service->GetDictionary(pref_names::kInstallForceList);
-    if (forcelist && forcelist->HasKey(id))
-      return true;
-  }
-  return false;
+  return ExtensionManagementFactory::GetForBrowserContext(context_)
+      ->IsInstallationAllowed(id);
 }
 
 std::string InstallVerifier::GetDebugPolicyProviderName() const {