Blink implementation of PushManager#hasPermission()

Source/modules/push_messaging/PushPermissionCallback.cpp

Index: Source/modules/push_messaging/PushPermissionCallback.cpp
diff --git a/Source/modules/push_messaging/PushPermissionCallback.cpp b/Source/modules/push_messaging/PushPermissionCallback.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..ed4bebc04c0cebfa1473fb34485ff77783e2ce24
--- /dev/null
+++ b/Source/modules/push_messaging/PushPermissionCallback.cpp
@@ -0,0 +1,53 @@
+// 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.
+
+#include "config.h"
+#include "modules/push_messaging/PushPermissionCallback.h"
+
+#include "bindings/core/v8/ScriptPromiseResolver.h"
+#include "core/dom/ExceptionCode.h"
+#include "wtf/text/WTFString.h"
+
+namespace blink {
+
+PushPermissionCallback::PushPermissionCallback(PassRefPtr<ScriptPromiseResolver> resolver)
+    : m_resolver(resolver)
+{
+}
+
+PushPermissionCallback::~PushPermissionCallback()
+{
+}
+
+void PushPermissionCallback::onSuccess(WebPushPermissionStatus* status)
+{
+    m_resolver->resolve(permissionString(*status));
+}
+
+void PushPermissionCallback::onError()
+{
+    m_resolver->reject();
+}
+
+// static
+const String& PushPermissionCallback::permissionString(WebPushPermissionStatus status)
+{
+    DEFINE_STATIC_LOCAL(const String, grantedPermission, ("granted"));
+    DEFINE_STATIC_LOCAL(const String, deniedPermission, ("denied"));
+    DEFINE_STATIC_LOCAL(const String, defaultPermission, ("default"));
+
+    switch (status) {
+    case WebPushPermissionStatusGranted:
+        return grantedPermission;
+    case WebPushPermissionStatusDenied:
+        return deniedPermission;
+    case WebPushPermissionStatusDefault:
+        return defaultPermission;
+    }
+
+    ASSERT_NOT_REACHED();
+    return deniedPermission;
+}
+
+} // namespace blink