Reland: service worker: Don't control a subframe of an insecure context

content/public/browser/content_browser_client.h

Index: content/public/browser/content_browser_client.h
diff --git a/content/public/browser/content_browser_client.h b/content/public/browser/content_browser_client.h
index 8f38d85f3e79a62389d41ce4fb3ef5432999d3a7..b43bb620b7bee29453b037a35b69873c6c5bc743 100644
--- a/content/public/browser/content_browser_client.h
+++ b/content/public/browser/content_browser_client.h
@@ -596,6 +596,12 @@ class CONTENT_EXPORT ContentBrowserClient {
   virtual void GetAdditionalAllowedSchemesForFileSystem(
       std::vector<std::string>* additional_schemes) {}
 
+  // |schemes| is a return value parameter that gets a whitelist of schemes that
+  // should bypass the Is Privileged Context check.
+  // See http://www.w3.org/TR/powerful-features/#settings-privileged
+  virtual void GetSchemesBypassingSecureContextCheckWhitelist(
+      std::set<std::string>* schemes) {}
+
   // Returns auto mount handlers for URL requests for FileSystem APIs.
   virtual void GetURLRequestAutoMountHandlers(
       std::vector<storage::URLRequestAutoMountHandler>* handlers) {}