Extensions: Move id_util functions to crx_file component.

extensions/renderer/user_script_set_manager.cc

Index: extensions/renderer/user_script_set_manager.cc
diff --git a/extensions/renderer/user_script_set_manager.cc b/extensions/renderer/user_script_set_manager.cc
index 6aa22d91dc8351ceac92d7d4889790c521eb0163..6f4679211b96f2f43f81cf2a6c306da8046f6278 100644
--- a/extensions/renderer/user_script_set_manager.cc
+++ b/extensions/renderer/user_script_set_manager.cc
@@ -4,6 +4,7 @@
 
 #include "extensions/renderer/user_script_set_manager.h"
 
+#include "components/crx_file/id_util.h"
 #include "content/public/renderer/render_thread.h"
 #include "extensions/common/extension_messages.h"
 #include "extensions/renderer/dispatcher.h"
@@ -83,7 +84,7 @@ void UserScriptSetManager::OnUpdateUserScripts(
   for (std::set<std::string>::const_iterator iter = changed_extensions.begin();
        iter != changed_extensions.end();
        ++iter) {
-    if (!Extension::IdIsValid(*iter)) {
+    if (!crx_file::id_util::IdIsValid(*iter)) {
       NOTREACHED() << "Invalid extension id: " << *iter;
       return;
     }