feat: [extensions] background pages (#21591)

shell/browser/extensions/electron_process_manager_delegate.h

@@ -0,0 +1,41 @@
+// Copyright 2019 Slack Technologies, Inc. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef SHELL_BROWSER_EXTENSIONS_ELECTRON_PROCESS_MANAGER_DELEGATE_H_
+#define SHELL_BROWSER_EXTENSIONS_ELECTRON_PROCESS_MANAGER_DELEGATE_H_
+
+#include "base/compiler_specific.h"
+#include "base/macros.h"
+#include "content/public/browser/notification_observer.h"
+#include "content/public/browser/notification_registrar.h"
+#include "extensions/browser/process_manager_delegate.h"
+
+class Browser;
+class Profile;
+
+namespace extensions {
+
+// Support for ProcessManager. Controls cases where Electron wishes to disallow
+// extension background pages or defer their creation.
+class ElectronProcessManagerDelegate : public ProcessManagerDelegate {
+ public:
+  ElectronProcessManagerDelegate();
+  ~ElectronProcessManagerDelegate() override;
+
+  // ProcessManagerDelegate implementation:
+  bool AreBackgroundPagesAllowedForContext(
+      content::BrowserContext* context) const override;
+  bool IsExtensionBackgroundPageAllowed(
+      content::BrowserContext* context,
+      const Extension& extension) const override;
+  bool DeferCreatingStartupBackgroundHosts(
+      content::BrowserContext* context) const override;
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(ElectronProcessManagerDelegate);
+};
+
+}  // namespace extensions
+
+#endif  // SHELL_BROWSER_EXTENSIONS_ELECTRON_PROCESS_MANAGER_DELEGATE_H_