permissions: remove PermissionQueueController and introduce PermissionInfoBarManager

chrome/browser/permissions/permission_infobar_manager.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 CHROME_BROWSER_PERMISSIONS_PERMISSION_INFOBAR_MANAGER_H_
+#define CHROME_BROWSER_PERMISSIONS_PERMISSION_INFOBAR_MANAGER_H_
+
+#include "base/callback_forward.h"
+#include "base/containers/scoped_ptr_hash_map.h"
+#include "base/memory/weak_ptr.h"
+#include "chrome/browser/permissions/permission_request_id.h"
+#include "components/content_settings/core/common/content_settings.h"
+#include "components/content_settings/core/common/content_settings_types.h"
+#include "content/public/browser/web_contents_observer.h"
+#include "content/public/browser/web_contents_user_data.h"
+
+class GURL;
+class PermissionInfoBarRequest;
+
+// Manages permsision requests using InfoBars. Requests are coalesced by
+// request_id. If multiple requests occur with overlapping permissions, both
+// will be shown and the last to have a response will be persisted.
+class PermissionInfoBarManager
+    : public content::WebContentsObserver,
+      public content::WebContentsUserData<PermissionInfoBarManager> {
+ public:
+  ~PermissionInfoBarManager() override;
+
+  // Queues an infobar request to be shown at some point. Requests with
+  // the same |request_id| are coalesced.
+  void CreateRequest(
+      const ContentSettingsType type,
+      const PermissionRequestID& request,
+      const GURL& requesting_origin,
+      const GURL& embedding_origin,
+      const base::Callback<void(bool, ContentSetting)>& response_callback);
+
+  // Cancels a specific infobar request.
+  void CancelInfoBarRequest(const PermissionRequestID& request);

[mlamouri (slow - plz ping), 2015/09/29 14:02:18]

Hmm, CancelRequest().

[Lalit Maganti, 2015/10/01 17:05:13]

Done.

+
+ private:
+  friend class PermissionContextBaseTests;
+  friend class content::WebContentsUserData<PermissionInfoBarManager>;
+  using PermissionDecidedCallback = base::Callback<void(bool, ContentSetting)>;
+
+  explicit PermissionInfoBarManager(content::WebContents* web_contents);
+
+  void Accept();
+  void Closing();

[mlamouri (slow - plz ping), 2015/09/29 14:02:18]

Add comments.

[Lalit Maganti, 2015/10/01 17:05:14]

Done.

+
+  void TriggerShowNextQueuedRequest();
+  void ShowNextQueuedRequest();
+  void OnInfoBarClosed();

[mlamouri (slow - plz ping), 2015/09/29 14:02:18]

ditto

[Lalit Maganti, 2015/10/01 17:05:14]

Done.

+
+  void ClearCurrentRequest();
+  bool ShouldIgnoreQueuedRequests();

[mlamouri (slow - plz ping), 2015/09/29 14:02:18]

ditto

[Lalit Maganti, 2015/10/01 17:05:14]

Done.

+
+  scoped_ptr<PermissionInfoBarRequest> current_request_;
+  int current_request_id_;

[mlamouri (slow - plz ping), 2015/09/29 14:02:18]

Why can't you do:
current_request_->request_id?

[Lalit Maganti, 2015/10/01 17:05:14]

Done.

+
+  bool is_show_queued_pending_;

[mlamouri (slow - plz ping), 2015/09/29 14:02:18]

I think my confusion is that "queued" and "pending" sound pretty much the same.
I think |is_show_pending_| or |is_show_queued_| would be better with a slight
preference for the former :)

[Lalit Maganti, 2015/10/01 17:05:14]

Done.

+
+  base::ScopedPtrHashMap<int,
+      scoped_ptr<PermissionInfoBarRequest>> queued_requests_;
+
+  base::WeakPtrFactory<PermissionInfoBarManager> weak_factory_;
+
+  DISALLOW_COPY_AND_ASSIGN(PermissionInfoBarManager);
+};
+
+#endif  // CHROME_BROWSER_PERMISSIONS_PERMISSION_INFOBAR_MANAGER_H_