Implement Permissions.query() and static PermissionStatus.

public/platform/modules/permissions/WebPermissionStatus.h

Index: public/platform/modules/permissions/WebPermissionStatus.h
diff --git a/public/platform/modules/permissions/WebPermissionStatus.h b/public/platform/modules/permissions/WebPermissionStatus.h
new file mode 100644
index 0000000000000000000000000000000000000000..18e1023dd26a9f997d441eaee2ab9ef888710e00
--- /dev/null
+++ b/public/platform/modules/permissions/WebPermissionStatus.h
@@ -0,0 +1,18 @@
+// 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 WebPermissionStatus_h
+#define WebPermissionStatus_h
+
+namespace blink {
+
+enum WebPermissionStatus {
+    WebPermissionStatusGranted,
+    WebPermissionStatusDenied,
+    WebPermissionStatusPrompt,
+};
+
+} // namespace blink
+
+#endif // WebPermissionStatus_h