Extensions: Move id_util functions to crx_file component.

chrome/browser/extensions/webstore_standalone_installer.cc

Index: chrome/browser/extensions/webstore_standalone_installer.cc
diff --git a/chrome/browser/extensions/webstore_standalone_installer.cc b/chrome/browser/extensions/webstore_standalone_installer.cc
index 859cf48067c0ff3161a98ef25739f088b57bd2b3..dc9ea0efdf251a5aa54c0c03d6b66805291d7973 100644
--- a/chrome/browser/extensions/webstore_standalone_installer.cc
+++ b/chrome/browser/extensions/webstore_standalone_installer.cc
@@ -14,6 +14,7 @@
 #include "chrome/browser/extensions/install_tracker.h"
 #include "chrome/browser/extensions/webstore_data_fetcher.h"
 #include "chrome/browser/profiles/profile.h"
+#include "components/crx_file/id_util.h"
 #include "content/public/browser/web_contents.h"
 #include "extensions/browser/extension_prefs.h"
 #include "extensions/browser/extension_registry.h"
@@ -55,7 +56,7 @@ void WebstoreStandaloneInstaller::BeginInstall() {
   // AbortInstall, which both release this ref.
   AddRef();
 
-  if (!Extension::IdIsValid(id_)) {
+  if (!crx_file::id_util::IdIsValid(id_)) {
     CompleteInstall(webstore_install::INVALID_ID, kInvalidWebstoreItemId);
     return;
   }