browser: implement multiple permission requesting

content/browser/permissions/permission_service_impl.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_IMPL_H_
 #define CONTENT_BROWSER_PERMISSIONS_PERMISSION_SERVICE_IMPL_H_
 
 #include "base/id_map.h"
 #include "base/macros.h"
 #include "base/memory/weak_ptr.h"
 #include "content/browser/permissions/permission_service_context.h"
 #include "content/common/permission_service.mojom.h"
 #include "third_party/mojo/src/mojo/public/cpp/bindings/binding.h"
 
 namespace content {
 
 enum class PermissionType;
 
 // Implements the PermissionService Mojo interface.
 // This service can be created from a RenderFrameHost or a RenderProcessHost.
 // It is owned by a PermissionServiceContext.
 // It receives at PermissionServiceContext instance when created which allows it
 // to have some information about the current context. That enables the service
 // to know whether it can show UI and have knowledge of the associated
 // WebContents for example.
 class PermissionServiceImpl : public PermissionService {
  public:
   ~PermissionServiceImpl() override;
-

[mlamouri (slow - plz ping), 2015/09/23 16:37:37]

nit: do not remove this line.

[Lalit Maganti, 2015/09/24 09:24:11]

Done.

   // Clear pending operations currently run by the service. This will be called
   // by PermissionServiceContext when it will need the service to clear its
   // state for example, if the frame changes.
   void CancelPendingOperations();
 
  protected:
   friend PermissionServiceContext;
 
   PermissionServiceImpl(PermissionServiceContext* context,
                         mojo::InterfaceRequest<PermissionService> request);
 
  private:
   using PermissionStatusCallback = mojo::Callback<void(PermissionStatus)>;
   using PermissionsStatusCallback =
       mojo::Callback<void(mojo::Array<PermissionStatus>)>;
 
   struct PendingRequest {
-    PendingRequest(PermissionType permission, const GURL& origin,
-                   const PermissionStatusCallback& callback);
+    PendingRequest(const PermissionsStatusCallback& callback,
+                   int request_count);
     ~PendingRequest();
 
     // Request ID received from the PermissionManager.
     int id;
-    PermissionType permission;
-    GURL origin;
-    PermissionStatusCallback callback;
+    PermissionsStatusCallback callback;
+    int request_count;
   };
   using RequestsMap = IDMap<PendingRequest, IDMapOwnPointer>;
 
   struct PendingSubscription {
     PendingSubscription(PermissionType permission, const GURL& origin,
                         const PermissionStatusCallback& callback);
     ~PendingSubscription();
 
     // Subscription ID received from the PermissionManager.
     int id;
@@ skipping 19 matching lines @@
                         const mojo::String& origin,
                         const PermissionStatusCallback& callback) override;
   void GetNextPermissionChange(
       PermissionName permission,
       const mojo::String& origin,
       PermissionStatus last_known_status,
       const PermissionStatusCallback& callback) override;
 
   void OnConnectionError();
 
-  void OnRequestPermissionResponse(int request_id, PermissionStatus status);
+  void OnRequestPermissionResponse(
+      int pending_request_id,
+      PermissionStatus status);
+  void OnRequestPermissionsResponse(
+      int pending_request_id,
+      const std::vector<PermissionStatus>& result);
 
   PermissionStatus GetPermissionStatusFromName(PermissionName permission,
                                                const GURL& origin);
   PermissionStatus GetPermissionStatusFromType(PermissionType type,
                                                const GURL& origin);
   void ResetPermissionStatus(PermissionType type, const GURL& origin);
 
   void OnPermissionStatusChanged(int pending_subscription_id,
                                  PermissionStatus status);
 
   RequestsMap pending_requests_;
   SubscriptionsMap pending_subscriptions_;
   // context_ owns |this|.
   PermissionServiceContext* context_;
   mojo::Binding<PermissionService> binding_;
   base::WeakPtrFactory<PermissionServiceImpl> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(PermissionServiceImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_PERMISSIONS_PERMISSION_SERVICE_IMPL_H_