renderer: implement multiple permission requesting

content/child/permissions/permission_dispatcher.h

Index: content/child/permissions/permission_dispatcher.h
diff --git a/content/child/permissions/permission_dispatcher.h b/content/child/permissions/permission_dispatcher.h
index 769222eb5649347b4732f65a13431be8dbb559dd..f6d4572ff1f73535399845c346ae952e6fe7c772 100644
--- a/content/child/permissions/permission_dispatcher.h
+++ b/content/child/permissions/permission_dispatcher.h
@@ -43,6 +43,10 @@ class PermissionDispatcher : public blink::WebPermissionClient,
   virtual void requestPermission(blink::WebPermissionType,
                                  const blink::WebURL& origin,
                                  blink::WebPermissionCallback* callback);
+  virtual void requestPermissions(
+      const blink::WebVector<blink::WebPermissionType>& types,
+      const blink::WebURL& origin,
+      blink::WebPermissionsCallback* callback);
   virtual void revokePermission(blink::WebPermissionType,
                                 const blink::WebURL& origin,
                                 blink::WebPermissionCallback* callback);
@@ -60,6 +64,11 @@ class PermissionDispatcher : public blink::WebPermissionClient,
                                   const std::string& origin,
                                   blink::WebPermissionCallback* callback,
                                   int worker_thread_id);
+  void RequestPermissionsForWorker(
+      const blink::WebVector<blink::WebPermissionType>& types,
+      const std::string& origin,
+      blink::WebPermissionsCallback* callback,
+      int worker_thread_id);
   void RevokePermissionForWorker(blink::WebPermissionType type,
                                  const std::string& origin,
                                  blink::WebPermissionCallback* callback,
@@ -78,12 +87,17 @@ class PermissionDispatcher : public blink::WebPermissionClient,
 
  private:
    using PendingCallbackVector = ScopedVector<blink::WebPermissionCallback>;
+   using PendingBatchCallbackVector =
+      ScopedVector<blink::WebPermissionsCallback>;
 
   // Runs the given |callback| with |status| as a parameter. It has to be run
   // on a worker thread.
   static void RunCallbackOnWorkerThread(
       blink::WebPermissionCallback* callback,
       scoped_ptr<blink::WebPermissionStatus> status);
+  static void RunMultiCallbackOnWorkerThread(
+      blink::WebPermissionsCallback* callback,
+      scoped_ptr<blink::WebVector<blink::WebPermissionStatus>> statuses);
 
   // Helper method that returns an initialized PermissionServicePtr.
   PermissionServicePtr& GetPermissionServicePtr();
@@ -96,6 +110,11 @@ class PermissionDispatcher : public blink::WebPermissionClient,
                                 const std::string& origin,
                                 blink::WebPermissionCallback* callback,
                                 int worker_thread_id);
+  void RequestPermissionsInternal(
+      const blink::WebVector<blink::WebPermissionType>& types,
+      const std::string& origin,
+      blink::WebPermissionsCallback* callback,
+      int worker_thread_id);
   void RevokePermissionInternal(blink::WebPermissionType type,
                                 const std::string& origin,
                                 blink::WebPermissionCallback* callback,
@@ -105,6 +124,10 @@ class PermissionDispatcher : public blink::WebPermissionClient,
   void OnPermissionResponse(int worker_thread_id,
                             PendingCallbackVector::iterator callback_iterator,
                             PermissionStatus status);
+  void OnPermissionsResponse(
+      int worker_thread_id,
+      PendingBatchCallbackVector::iterator callback_iterator,
+      const mojo::Array<PermissionStatus>& status);
   void OnPermissionChanged(blink::WebPermissionType type,
                            const std::string& origin,
                            blink::WebPermissionObserver* observer,
@@ -120,6 +143,7 @@ class PermissionDispatcher : public blink::WebPermissionClient,
                                PermissionStatus current_status);
 
   PendingCallbackVector pending_callbacks_;
+  PendingBatchCallbackVector batch_pending_callbacks_;
 
   ServiceRegistry* service_registry_;
   PermissionServicePtr permission_service_;