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/SyncRegistrationCallbacks.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 {
+
+WebSyncProvider* backgroundSyncProvider()
+{
+    WebSyncProvider* webSyncProvider = Platform::current()->backgroundSyncProvider();
+    ASSERT(webSyncProvider);
+    return webSyncProvider;
+}
+
+} // namespace
+
+unsigned long SyncManager::minAllowablePeriod()
+{
+    return m_minAllowablePeriod;
+}
+
+ScriptPromise SyncManager::registerFunction(blink::ScriptState* scriptState)
+{
+    RefPtrWillBeRawPtr<ScriptPromiseResolver> resolver = ScriptPromiseResolver::create(scriptState);
+    ScriptPromise promise = resolver->promise();
+
+    backgroundSyncProvider()->registerBackgroundSync(0, new SyncRegistrationCallbacks(resolver, m_registration));
+
+    return promise;
+}
+
+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));
+
+    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(InvalidStateError, "Not implemented"));
+
+    return promise;
+}
+
+void SyncManager::trace(Visitor *visitor)
+{
+    visitor->trace(m_registration);
+}
+
+} // namespace blink