[Extension ServiceWorkers] Allow service worker registration

chrome/common/chrome_content_client.cc

Index: chrome/common/chrome_content_client.cc
diff --git a/chrome/common/chrome_content_client.cc b/chrome/common/chrome_content_client.cc
index ce52fa34e6201d6fbac6fb4ac1efb429e50c16da..c9d90ab8b31586ff790e284a6b244464f2353d2e 100644
--- a/chrome/common/chrome_content_client.cc
+++ b/chrome/common/chrome_content_client.cc
@@ -585,3 +585,8 @@ void ChromeContentClient::AddSecureSchemesAndOrigins(
   schemes->insert(extensions::kExtensionResourceScheme);
   GetSecureOriginWhitelist(origins);
 }
+
+void ChromeContentClient::AddServiceWorkerSchemes(
+    std::set<std::string>* schemes) {
+  schemes->insert(extensions::kExtensionScheme);
+}