Allow script to request durable storage permission (chrome side)

content/renderer/durable_dispatcher.h

+// Copyright 2013 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 CONTENT_RENDERER_DURABLE_DISPATCHER_H_
+#define CONTENT_RENDERER_DURABLE_DISPATCHER_H_
+
+#include "base/id_map.h"
+#include "content/common/permission_service.mojom.h"
+#include "content/public/renderer/render_frame_observer.h"
+#include "third_party/WebKit/public/platform/WebURL.h"
+#include "third_party/WebKit/public/platform/modules/quota/WebDurableStorageDispatcher.h"
+
+using blink::WebURL;
+
+namespace content {
+
+// It works as RenderFrameObserver to keep a 1:1 relationship with a RenderFrame
+// and make sure it has the same life cycle.
+class DurableStorageDispatcher : public RenderFrameObserver,
+                                 public blink::WebDurableStorageDispatcher {
+ public:
+  explicit DurableStorageDispatcher(RenderFrame* render_frame);
+  virtual ~DurableStorageDispatcher();
+
+ private:
+  virtual void requestPermission(
+      const WebURL& url,
+      blink::WebDurableStoragePermissionCallbacks* callbacks);

[mlamouri (slow - plz ping), 2015/07/02 09:53:01]

Technically, the Blink code could directly call the PermissionDispatcher instead
of going that way.

[dgrogan, 2015/07/07 04:15:11]

That would involve adding some kind of requestPermission() method to the
WebPermissionClient interface, correct? I will give that a try tomorrow.

[dgrogan, 2015/07/09 02:59:22]

I deleted durable_dispatcher.h in favor of adding requestDurablePermission() to
WebPermissionClient. Take a look and let me know if that's what you had in mind.

+
+  void OnPermissionSet(PermissionStatus status);
+
+  // TODO:
+  // Is this sufficient? What if permission is requested in the promise handler?
+  scoped_ptr<blink::WebDurableStoragePermissionCallbacks> callbacks_;
+  PermissionServicePtr permission_service_;
+
+  DISALLOW_COPY_AND_ASSIGN(DurableStorageDispatcher);
+};
+
+}  // namespace content
+
+#endif  // CONTENT_RENDERER_DURABLE_DISPATCHER_H_