Service Worker: Expose Get/Store/ClearUserData to content layer.

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>
 
@@ skipping 11 matching lines @@
 
 // Represents the per-StoragePartition ServiceWorker data.
 class ServiceWorkerContext {
  public:
   // https://rawgithub.com/slightlyoff/ServiceWorker/master/spec/service_worker/index.html#url-scope:
   // roughly, must be of the form "<origin>/<path>/*".
   typedef GURL Scope;
 
   typedef base::Callback<void(bool success)> ResultCallback;
 
+  typedef base::Callback<void(const std::string& data,
+                              bool success,
+                              bool not_found)> GetUserDataCallback;
+
   typedef base::Callback<void(const std::vector<ServiceWorkerUsageInfo>&
                                   usage_info)> GetUsageInfoCallback;
 
   // Registers the header name which should not be passed to the ServiceWorker.
   // Must be called from the IO thread.
   CONTENT_EXPORT static void AddExcludedHeadersForFetchEvent(
       const std::set<std::string>& header_names);
 
   // Returns true if the header name should not be passed to the ServiceWorker.
   // Must be called from the IO thread.
@@ skipping 22 matching lines @@
   // 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.
   //
   // Unregistration can fail if:
   //  * No Service Worker was registered for |pattern|.
   //  * Something unexpected goes wrong, like a renderer crash.
   virtual void UnregisterServiceWorker(const Scope& pattern,
                                        const ResultCallback& callback) = 0;
 
+  // Provide a storage mechanism to read/write arbitrary data associated with
+  // a registration. Each registration has its own key namespace. Stored data
+  // is deleted when the associated registraton is deleted. Must all be called
+  // from the IO thread.
+  virtual void GetUserData(int64 registration_id,
+                           const std::string& key,
+                           const GetUserDataCallback& callback) = 0;
+  virtual void StoreUserData(int64 registration_id,
+                             const GURL& origin,
+                             const std::string& key,
+                             const std::string& data,
+                             const ResultCallback& callback) = 0;
+  virtual void ClearUserData(int64 registration_id,
+                             const std::string& key,
+                             const ResultCallback& callback) = 0;
+
   // TODO(jyasskin): Provide a way to SendMessage to a Scope.
 
   // Determines if a request for 'url' can be satisfied while offline.
   // This method always completes asynchronously.
   virtual void CanHandleMainResourceOffline(const GURL& url,
                                             const GURL& first_party,
                                             const net::CompletionCallback&
                                             callback) = 0;
 
   // Methods used in response to browsing data and quota manager requests.
   virtual void GetAllOriginsInfo(const GetUsageInfoCallback& callback) = 0;
   virtual void DeleteForOrigin(const GURL& origin_url) = 0;
 
  protected:
   ServiceWorkerContext() {}
   virtual ~ServiceWorkerContext() {}
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_BROWSER_SERVICE_WORKER_CONTEXT_H_