ServiceWorker: some more groundwork in support of the update process

content/common/service_worker/service_worker_types.h

Index: content/common/service_worker/service_worker_types.h
diff --git a/content/common/service_worker/service_worker_types.h b/content/common/service_worker/service_worker_types.h
index 8ee5545d50c2c464b6d5891d2b9effaf2cbc4e4d..86324baf8d320fe65ee1b4c820942d1f1bcce1f5 100644
--- a/content/common/service_worker/service_worker_types.h
+++ b/content/common/service_worker/service_worker_types.h
@@ -31,6 +31,15 @@ const static int64 kInvalidServiceWorkerVersionId = -1;
 const static int64 kInvalidServiceWorkerResourceId = -1;
 const static int64 kInvalidServiceWorkerResponseId = -1;
 
+// Indicates how the service worker handled a fetch event.
+enum ServiceWorkerFetchEventResult {
+  // Browser should fallback to native fetch.
+  SERVICE_WORKER_FETCH_EVENT_RESULT_FALLBACK,
+  // Service worker provided a ServiceWorkerResponse.
+  SERVICE_WORKER_FETCH_EVENT_RESULT_RESPONSE,
+  SERVICE_WORKER_FETCH_EVENT_LAST = SERVICE_WORKER_FETCH_EVENT_RESULT_RESPONSE
+};
+
 // To dispatch fetch request from browser to child process.
 // TODO(kinuko): This struct will definitely need more fields and
 // we'll probably want to have response struct/class too.
@@ -48,15 +57,6 @@ struct CONTENT_EXPORT ServiceWorkerFetchRequest {
   bool is_reload;
 };
 
-// Indicates how the service worker handled a fetch event.
-enum ServiceWorkerFetchEventResult {
-  // Browser should fallback to native fetch.
-  SERVICE_WORKER_FETCH_EVENT_RESULT_FALLBACK,
-  // Service worker provided a ServiceWorkerResponse.
-  SERVICE_WORKER_FETCH_EVENT_RESULT_RESPONSE,
-  SERVICE_WORKER_FETCH_EVENT_LAST = SERVICE_WORKER_FETCH_EVENT_RESULT_RESPONSE
-};
-
 // Represents a response to a fetch.
 struct CONTENT_EXPORT ServiceWorkerResponse {
   ServiceWorkerResponse();
@@ -81,6 +81,30 @@ struct CONTENT_EXPORT ServiceWorkerObjectInfo {
   blink::WebServiceWorkerState state;
 };
 
+class ChangedVersionAttributesMask {
+ public:
+  enum {
+    INSTALLING_VERSION = 1 << 0,
+    WAITING_VERSION = 1 << 1,
+    ACTIVE_VERSION = 1 << 2,
+    CONTROLLING_VERSION = 1 << 3,
+  };
+
+  ChangedVersionAttributesMask() : changed_(0) {}
+  explicit ChangedVersionAttributesMask(int changed) : changed_(changed) {}
+
+  int changed() const { return changed_; }
+
+  void add(int changed_versions) { changed_ |= changed_versions; }
+  bool installing_changed() const { return !!(changed_ & INSTALLING_VERSION); }
+  bool waiting_changed() const { return !!(changed_ & WAITING_VERSION); }
+  bool active_changed() const { return !!(changed_ & ACTIVE_VERSION); }
+  bool controller_changed() const { return !!(changed_ & CONTROLLING_VERSION); }
+
+ private:
+  int changed_;
+};
+
 }  // namespace content
 
 #endif  // CONTENT_COMMON_SERVICE_WORKER_SERVICE_WORKER_TYPES_H_