Implement updateViaCache flag and no-cache by default for main service worker scripts

content/public/browser/service_worker_context.h

Index: content/public/browser/service_worker_context.h
diff --git a/content/public/browser/service_worker_context.h b/content/public/browser/service_worker_context.h
index 90c3d93ad587025b5c88774716313c632e1a94e7..e64a618a7b23fcee7fc4c9421e66c9469a41314e 100644
--- a/content/public/browser/service_worker_context.h
+++ b/content/public/browser/service_worker_context.h
@@ -52,9 +52,10 @@ class ServiceWorkerContext {
   static bool IsExcludedHeaderNameForFetchEvent(const std::string& header_name);
 
   // Equivalent to calling navigator.serviceWorker.register(script_url, {scope:
-  // pattern}) from a renderer, except that |pattern| is an absolute URL instead
-  // of relative to some current origin.  |callback| is passed true when the JS
-  // promise is fulfilled or false when the JS promise is rejected.
+  // pattern, useCache: use_cache}) from a renderer, except that |pattern| is an
+  // absolute URL instead of relative to some current origin.  |callback| is
+  // passed true when the JS promise is fulfilled or false when the JS promise
+  // is rejected.
   //
   // The registration can fail if:
   //  * |script_url| is on a different origin from |pattern|
@@ -67,6 +68,7 @@ class ServiceWorkerContext {
   // be called on the UI thread.
   virtual void RegisterServiceWorker(const Scope& pattern,
                                      const GURL& script_url,
+                                     bool use_cache,
                                      const ResultCallback& callback) = 0;
 
   // Mechanism for embedder to increment/decrement ref count of a service