renderer: implement multiple permission requesting

content/browser/permissions/permission_pending_multiple_request.h

+// 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 CONTENT_BROWSER_PERMISSIONS_PERMISSION_PENDING_MULTIPLE_REQUEST_H_
+#define CONTENT_BROWSER_PERMISSIONS_PERMISSION_PENDING_MULTIPLE_REQUEST_H_
+
+#include "base/callback_forward.h"
+#include "base/macros.h"
+#include "content/browser/permissions/permission_pending_request.h"
+#include "content/common/permission_service.mojom.h"
+#include "third_party/mojo/src/mojo/public/cpp/bindings/binding.h"
+#include "url/gurl.h"
+
+namespace content {
+
+enum class PermissionType;
+
+class PermissionPendingMultipleRequest : public PermissionPendingRequest {
+ public:
+  using PermissionsStatusCallback =
+      mojo::Callback<void(mojo::Array<PermissionStatus>)>;
+
+  PermissionPendingMultipleRequest(PermissionsStatusCallback callback,
+                                   int request_count);
+  ~PermissionPendingMultipleRequest() override;
+
+  void Cancel(PermissionManager* permission_manager,
+              RenderFrameHost* context,
+              int request_id) override;
+
+  PermissionsStatusCallback callback;

[mlamouri (slow - plz ping), 2015/08/18 13:37:15]

This is not allowed. You must have the callback private (renamed to callback_)
and have accessors.

[Lalit Maganti, 2015/08/20 14:23:30]

The reason I did this was because I remembered that in Manifest there were
public fields and it was OK. But then I realised that manifest was actually just
a storage class and it's also a struct rather than a class.

Done.

+
+ private:
+  int request_count;

[mlamouri (slow - plz ping), 2015/08/18 13:37:15]

style: request_count_

[Lalit Maganti, 2015/08/20 14:23:30]

Done.

+
+ DISALLOW_COPY_AND_ASSIGN(PermissionPendingMultipleRequest);
+};
+
+}  // namespace content
+
+#endif  // CONTENT_BROWSER_PERMISSIONS_PERMISSION_PENDING_MULTIPLE_REQUEST_H_