feat: [extensions] background pages (#21591)

shell/browser/extensions/electron_messaging_delegate.h

@@ -0,0 +1,58 @@
+// Copyright (c) 2019 Slack Technologies, Inc.
+// Use of this source code is governed by the MIT license that can be
+// found in the LICENSE file.
+
+#ifndef SHELL_BROWSER_EXTENSIONS_ELECTRON_MESSAGING_DELEGATE_H_
+#define SHELL_BROWSER_EXTENSIONS_ELECTRON_MESSAGING_DELEGATE_H_
+
+#include <memory>
+#include <string>
+
+#include "extensions/browser/api/messaging/messaging_delegate.h"
+
+namespace extensions {
+
+// Helper class for Chrome-specific features of the extension messaging API.
+class ElectronMessagingDelegate : public MessagingDelegate {
+ public:
+  ElectronMessagingDelegate();
+  ~ElectronMessagingDelegate() override;
+
+  // MessagingDelegate:
+  PolicyPermission IsNativeMessagingHostAllowed(
+      content::BrowserContext* browser_context,
+      const std::string& native_host_name) override;
+  std::unique_ptr<base::DictionaryValue> MaybeGetTabInfo(
+      content::WebContents* web_contents) override;
+  content::WebContents* GetWebContentsByTabId(
+      content::BrowserContext* browser_context,
+      int tab_id) override;
+  std::unique_ptr<MessagePort> CreateReceiverForTab(
+      base::WeakPtr<MessagePort::ChannelDelegate> channel_delegate,
+      const std::string& extension_id,
+      const PortId& receiver_port_id,
+      content::WebContents* receiver_contents,
+      int receiver_frame_id) override;
+  std::unique_ptr<MessagePort> CreateReceiverForNativeApp(
+      content::BrowserContext* browser_context,
+      base::WeakPtr<MessagePort::ChannelDelegate> channel_delegate,
+      content::RenderFrameHost* source,
+      const std::string& extension_id,
+      const PortId& receiver_port_id,
+      const std::string& native_app_name,
+      bool allow_user_level,
+      std::string* error_out) override;
+  void QueryIncognitoConnectability(
+      content::BrowserContext* context,
+      const Extension* extension,
+      content::WebContents* web_contents,
+      const GURL& url,
+      const base::Callback<void(bool)>& callback) override;
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(ElectronMessagingDelegate);
+};
+
+}  // namespace extensions
+
+#endif  // SHELL_BROWSER_EXTENSIONS_ELECTRON_MESSAGING_DELEGATE_H_