Add IDL and initial Blink API for Background Sync

Source/modules/background_sync/SyncManager.cpp

+// Copyright 2015 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.
+
+#include "config.h"
+#include "modules/background_sync/SyncManager.h"
+
+#include "bindings/core/v8/CallbackPromiseAdapter.h"
+#include "bindings/core/v8/ScriptPromise.h"
+#include "bindings/core/v8/ScriptPromiseResolver.h"
+#include "bindings/core/v8/ScriptState.h"
+#include "core/dom/DOMException.h"
+#include "core/dom/Document.h"
+#include "core/dom/ExceptionCode.h"
+#include "core/dom/ExecutionContext.h"
+#include "modules/background_sync/SyncCallbacks.h"
+#include "modules/background_sync/SyncRegistrationOptions.h"
+#include "modules/serviceworkers/ServiceWorkerRegistration.h"
+#include "public/platform/Platform.h"
+#include "public/platform/modules/background_sync/WebSyncProvider.h"
+#include "wtf/RefPtr.h"
+
+
+namespace blink {
+namespace {
+
+    unsigned long kMinAllowablePeriod = 60000;
+
+    WebSyncProvider* backgroundSyncProvider()
+    {
+        WebSyncProvider* webSyncProvider = Platform::current()->backgroundSyncProvider();
+        ASSERT(webSyncProvider);
+        return webSyncProvider;
+    }
+
+}
+
+SyncManager::SyncManager(ServiceWorkerRegistration* registration)
+    : m_registration(registration)
+{
+    ASSERT(registration);
+}
+
+unsigned long SyncManager::minAllowablePeriod()
+{
+    return kMinAllowablePeriod;
+}
+
+ScriptPromise SyncManager::registerFunction(blink::ScriptState* scriptState, const SyncRegistrationOptions& options)
+{
+    RefPtrWillBeRawPtr<ScriptPromiseResolver> resolver = ScriptPromiseResolver::create(scriptState);
+    ScriptPromise promise = resolver->promise();
+
+    backgroundSyncProvider()->registerBackgroundSync(0, new SyncRegistrationCallbacks(resolver, m_registration));

[Michael van Ouwerkerk, 2015/03/02 14:19:11]

What is the magic 0 for?

[Michael van Ouwerkerk, 2015/03/02 14:19:11]

The Push API has a separate path for this function that distinguishes between
document context and service worker context. Why does sync not need this?

[iclelland, 2015/03/05 04:32:48]

For temporary. I've added the code now that creates the correct
WebSyncRegistration object to call the provider.

Done.

[iclelland, 2015/03/05 04:32:48]

Register wasn't going to be available in the service worker context originally
(only from document, to prevent one-shot syncs from re-registering themselves
into periodic syncs.); this is changing, and so I'm adding that code path.

+
+    return promise;
+}
+
+ScriptPromise SyncManager::getRegistrations(blink::ScriptState* scriptState)
+{
+    RefPtrWillBeRawPtr<ScriptPromiseResolver> resolver = ScriptPromiseResolver::create(scriptState);
+    ScriptPromise promise = resolver->promise();
+
+    // Don't have anything useful to do ATM
+    resolver->reject(DOMException::create(NotSupportedError, "Not implemented"));
+
+    return promise;
+}
+
+DEFINE_TRACE(SyncManager)
+{
+    visitor->trace(m_registration);
+}
+
+} // namespace blink