Add IDL and initial Blink API for Background Sync

Source/modules/background_sync/SyncManager.h

Index: Source/modules/background_sync/SyncManager.h
diff --git a/Source/modules/push_messaging/PushManager.h b/Source/modules/background_sync/SyncManager.h
similarity index 33%
copy from Source/modules/push_messaging/PushManager.h
copy to Source/modules/background_sync/SyncManager.h
index 0bcd2ef4dd8d1228484a103be0b5ca45cab7e6cb..71c6d0a7e2702c80a574d21f1c0912c090e56465 100644
--- a/Source/modules/push_messaging/PushManager.h
+++ b/Source/modules/background_sync/SyncManager.h
@@ -1,39 +1,48 @@
-// Copyright 2014 The Chromium Authors. All rights reserved.
+// 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.
 
-#ifndef PushManager_h
-#define PushManager_h
+#ifndef SyncManager_h
+#define SyncManager_h
 
 #include "bindings/core/v8/ScriptWrappable.h"
 #include "platform/heap/Handle.h"
 
 namespace blink {
 
+class SyncRegistrationOptions;
+class ExecutionContext;
 class ScriptPromise;
+class ScriptPromiseResolver;
 class ScriptState;
 class ServiceWorkerRegistration;
 
-class PushManager final : public GarbageCollected<PushManager>, public ScriptWrappable {
+class SyncManager final
+    : public GarbageCollectedFinalized<SyncManager>
+    , public ScriptWrappable {
     DEFINE_WRAPPERTYPEINFO();
 public:
-    static PushManager* create(ServiceWorkerRegistration* registration)
+    static SyncManager* create(ServiceWorkerRegistration* registration)
     {
-        return new PushManager(registration);
+        return new SyncManager(registration);
     }
+    ~SyncManager() { }
 
-    ScriptPromise subscribe(ScriptState*);
-    ScriptPromise getSubscription(ScriptState*);
-    ScriptPromise hasPermission(ScriptState*);
+    unsigned long minAllowablePeriod();
 
-    DECLARE_TRACE();
+    ScriptPromise registerFunction(ScriptState*);
+    ScriptPromise registerFunction(ScriptState*, const SyncRegistrationOptions&);
+    ScriptPromise getRegistrations(ScriptState*);
+
+    void trace(Visitor*);
 
 private:
-    explicit PushManager(ServiceWorkerRegistration*);
+    explicit SyncManager(ServiceWorkerRegistration* registration) : m_registration(registration) { }
 
+    unsigned long m_minAllowablePeriod;
     Member<ServiceWorkerRegistration> m_registration;
 };
 
 } // namespace blink
 
-#endif // PushManager_h
+#endif // SyncManager_h