Switch PermissionStatus events to an observer model.

content/browser/permissions/permission_service_context.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 CONTENT_BROWSER_PERMISSIONS_PERMISSION_SERVICE_CONTEXT_H_
 #define CONTENT_BROWSER_PERMISSIONS_PERMISSION_SERVICE_CONTEXT_H_
 
 #include "base/macros.h"
 #include "base/memory/scoped_vector.h"
+#include "content/public/browser/permission_type.h"
 #include "content/public/browser/web_contents_observer.h"
 #include "mojo/public/cpp/bindings/interface_request.h"
 
 namespace blink {
 namespace mojom {
+class PermissionObserver;
 class PermissionService;
 }
 }
 
+namespace url {
+class Origin;
+}
+
 namespace content {
 
 class PermissionServiceImpl;
 class RenderFrameHost;
 class RenderProcessHost;
 
 // Provides information to a PermissionService. It is used by the
 // PermissionServiceImpl to handle request permission UI.
 // There is one PermissionServiceContext per RenderFrameHost/RenderProcessHost
 // which owns it. It then owns all PermissionServiceImpl associated to their
 // owner.
 class PermissionServiceContext : public WebContentsObserver {
  public:
   explicit PermissionServiceContext(RenderFrameHost* render_frame_host);
   explicit PermissionServiceContext(RenderProcessHost* render_process_host);
   ~PermissionServiceContext() override;
 
   void CreateService(
       mojo::InterfaceRequest<blink::mojom::PermissionService> request);
 
+  void CreateSubscription(
+      PermissionType permission_type,
+      const url::Origin& origin,
+      mojo::InterfacePtr<blink::mojom::PermissionObserver> observer);
+
   // Called by a PermissionServiceImpl identified as |service| when it has a
   // connection error in order to get unregistered and killed.
   void ServiceHadConnectionError(PermissionServiceImpl* service);
 
+  // Called when the connection to a PermissionObserver has an error.
+  void ObserverHadConnectionError(int subscription_id);
+
   BrowserContext* GetBrowserContext() const;
   GURL GetEmbeddingOrigin() const;
 
   RenderFrameHost* render_frame_host() const;
 
  private:
+  class PermissionSubscription;
+
   // WebContentsObserver
   void RenderFrameHostChanged(RenderFrameHost* old_host,
                               RenderFrameHost* new_host) override;
   void FrameDeleted(RenderFrameHost* render_frame_host) override;
   void DidNavigateAnyFrame(RenderFrameHost* render_frame_host,
                            const LoadCommittedDetails& details,
                            const FrameNavigateParams& params) override;
 
   void CancelPendingOperations(RenderFrameHost*) const;
 
   RenderFrameHost* render_frame_host_;
   RenderProcessHost* render_process_host_;
-  ScopedVector<PermissionServiceImpl> services_;
+  std::vector<std::unique_ptr<PermissionServiceImpl>> services_;
+  std::unordered_map<int, std::unique_ptr<PermissionSubscription>>
+      subscriptions_;
 
   DISALLOW_COPY_AND_ASSIGN(PermissionServiceContext);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_PERMISSIONS_PERMISSION_SERVICE_CONTEXT_H_