Implement Permissions.query() and static PermissionStatus.

Source/modules/permissions/PermissionStatus.h

 // 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.
 
 #ifndef PermissionStatus_h
 #define PermissionStatus_h
 
 #include "core/dom/ContextLifecycleObserver.h"
 #include "core/events/EventTarget.h"
 #include "platform/heap/Handle.h"
+#include "public/platform/modules/permissions/WebPermissionStatus.h"
+#include "public/platform/modules/permissions/WebPermissionType.h"
 #include "wtf/text/AtomicString.h"
 #include "wtf/text/WTFString.h"
 
 namespace blink {
 
 class ExecutionContext;
+class ScriptPromiseResolver;
 
 class PermissionStatus final
     : public RefCountedGarbageCollectedEventTargetWithInlineData<PermissionStatus>
     , public ContextLifecycleObserver {
     DEFINE_EVENT_TARGET_REFCOUNTING_WILL_BE_REMOVED(RefCountedGarbageCollected<PermissionStatus>);
     WILL_BE_USING_GARBAGE_COLLECTED_MIXIN(PermissionStatus);
     DEFINE_WRAPPERTYPEINFO();
 public:
-    static PermissionStatus* create(ExecutionContext*);
+    static PermissionStatus* take(ScriptPromiseResolver*, WebPermissionStatus*, WebPermissionType);
+    static void dispose(WebPermissionStatus*);
+
     ~PermissionStatus() override;
 
     // EventTarget implementation.
     const AtomicString& interfaceName() const override;
     ExecutionContext* executionContext() const override;
 
     DECLARE_VIRTUAL_TRACE();
 
     String status() const;
+    // TODO: needs to be used by the IDL

[mlamouri (slow - plz ping), 2015/03/06 11:53:48]

That thing is temporary because otherwise, this CL isn't really using m_type and
the compiler is complaining about it. The PermissionQueryCallback and
PermissionStatus will need that so better to pass it now instead of rewriting
most of the plumbing later.

+    WebPermissionType type() const { return m_type; }
 
     DEFINE_ATTRIBUTE_EVENT_LISTENER(change);
 
 private:
-    explicit PermissionStatus(ExecutionContext*);
+    explicit PermissionStatus(ExecutionContext*, WebPermissionType, WebPermissionStatus);
+
+    WebPermissionType m_type;
+    WebPermissionStatus m_status;
 };
 
 } // namespace blink
 
 #endif // PermissionStatus_h