Deprecate direct use of legacy extension management preference

chrome/browser/extensions/extension_management.cc

Index: chrome/browser/extensions/extension_management.cc
diff --git a/chrome/browser/extensions/extension_management.cc b/chrome/browser/extensions/extension_management.cc
index 15caf92fcdc9223be5f44ea06435905af991c7b9..863dcfb57ae25e40959f508e47e7d7bc725f1d1e 100644
--- a/chrome/browser/extensions/extension_management.cc
+++ b/chrome/browser/extensions/extension_management.cc
@@ -17,6 +17,7 @@
 #include "components/keyed_service/content/browser_context_dependency_manager.h"
 #include "extensions/browser/pref_names.h"
 #include "extensions/common/url_pattern.h"
+#include "url/gurl.h"
 
 namespace extensions {
 
@@ -94,6 +95,24 @@ bool ExtensionManagement::IsInstallationAllowed(const ExtensionId& id) const {
   return ReadById(id).installation_mode != INSTALLATION_BLOCKED;
 }
 
+bool ExtensionManagement::IsOffstoreInstallAllowed(const GURL& url,
+                                                   const GURL& referrer_url) {
+  // No allowed install sites specified, disallow by default.
+  if (!global_settings_.has_restricted_install_sources) {
+    return false;
+  }
+
+  const extensions::URLPatternSet& url_patterns =
+      global_settings_.install_sources;
+
+  if (!url_patterns.MatchesURL(url))
+    return false;
+
+  // The referrer URL must also be whitelisted, unless the URL has the file
+  // scheme (there's no referrer for those URLs).
+  return url.SchemeIsFile() || url_patterns.MatchesURL(referrer_url);
+}
+
 const ExtensionManagement::IndividualSettings& ExtensionManagement::ReadById(
     const ExtensionId& id) const {
   DCHECK(crx_file::id_util::IdIsValid(id)) << "Invalid ID: " << id;