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

content/public/browser/service_worker_context.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CONTENT_PUBLIC_BROWSER_SERVICE_WORKER_CONTEXT_H_
 #define CONTENT_PUBLIC_BROWSER_SERVICE_WORKER_CONTEXT_H_
 
 #include <set>
 #include <string>
 
 #include "base/callback_forward.h"
 #include "content/public/browser/service_worker_usage_info.h"
 #include "url/gurl.h"
 
+namespace blink {
+enum class WebServiceWorkerUpdateViaCache;
+}  // namespace blink
+
 namespace content {
 
 class ServiceWorkerContextObserver;
 
 enum class ServiceWorkerCapability {
   NO_SERVICE_WORKER,
   SERVICE_WORKER_NO_FETCH_HANDLER,
   SERVICE_WORKER_WITH_FETCH_HANDLER,
 };
 
@@ skipping 43 matching lines @@
   static bool IsExcludedHeaderNameForFetchEvent(const std::string& header_name);
 
   // Returns true if |url| is within the service worker |scope|.
   CONTENT_EXPORT static bool ScopeMatches(const GURL& scope, const GURL& url);
 
   // Observer methods are always dispatched on the UI thread.
   virtual void AddObserver(ServiceWorkerContextObserver* observer) = 0;
   virtual void RemoveObserver(ServiceWorkerContextObserver* observer) = 0;
 
   // 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, updateViaCache: update_via_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|
   //  * Fetching |script_url| fails.
   //  * |script_url| fails to parse or its top-level execution fails.
   //    TODO: The error message for this needs to be available to developers.
   //  * Something unexpected goes wrong, like a renderer crash or a full disk.
   //
   // This function can be called from any thread, but the callback will always
   // be called on the UI thread.
-  virtual void RegisterServiceWorker(const Scope& pattern,
-                                     const GURL& script_url,
-                                     const ResultCallback& callback) = 0;
+  virtual void RegisterServiceWorker(
+      const Scope& pattern,
+      const GURL& script_url,
+      blink::WebServiceWorkerUpdateViaCache update_via_cache,
+      const ResultCallback& callback) = 0;
 
   // Mechanism for embedder to increment/decrement ref count of a service
   // worker.
   // Embedders can call StartingExternalRequest() while it is performing some
   // work with the worker. The worker is considered to be working until embedder
   // calls FinishedExternalRequest(). This ensures that content/ does not
   // shut the worker down while embedder is expecting the worker to be kept
   // alive.
   //
   // Must be called from the IO thread. Returns whether or not changing the ref
@@ skipping 70 matching lines @@
       const StartServiceWorkerForNavigationHintCallback& callback) = 0;
 
  protected:
   ServiceWorkerContext() {}
   virtual ~ServiceWorkerContext() {}
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_BROWSER_SERVICE_WORKER_CONTEXT_H_