Add a link (to view Permissions) to the Extension details on chrome://extensions.

chrome/browser/ui/webui/extensions/extension_settings_handler.h

 // Copyright (c) 2012 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 CHROME_BROWSER_UI_WEBUI_EXTENSIONS_EXTENSION_SETTINGS_HANDLER_H_
 #define CHROME_BROWSER_UI_WEBUI_EXTENSIONS_EXTENSION_SETTINGS_HANDLER_H_
 
 #include <set>
 #include <string>
 #include <vector>
 
 #include "base/memory/scoped_ptr.h"
 #include "base/prefs/public/pref_change_registrar.h"
 #include "base/scoped_observer.h"
+#include "chrome/browser/extensions/extension_install_prompt.h"
 #include "chrome/browser/extensions/extension_install_ui.h"
 #include "chrome/browser/extensions/extension_uninstall_dialog.h"
 #include "chrome/browser/extensions/extension_warning_service.h"
 #include "chrome/browser/extensions/requirements_checker.h"
 #include "chrome/common/extensions/extension_resource.h"
 #include "content/public/browser/navigation_controller.h"
 #include "content/public/browser/notification_observer.h"
 #include "content/public/browser/notification_registrar.h"
 #include "content/public/browser/render_view_host.h"
 #include "content/public/browser/web_contents_observer.h"
@@ skipping 34 matching lines @@
   int render_view_id;
   bool incognito;
 };
 
 // Extension Settings UI handler.
 class ExtensionSettingsHandler
     : public content::WebUIMessageHandler,
       public content::NotificationObserver,
       public content::WebContentsObserver,
       public ui::SelectFileDialog::Listener,
+      public ExtensionInstallPrompt::Delegate,
       public ExtensionUninstallDialog::Delegate,
       public extensions::ExtensionWarningService::Observer,
       public base::SupportsWeakPtr<ExtensionSettingsHandler> {
  public:
   ExtensionSettingsHandler();
   virtual ~ExtensionSettingsHandler();
 
   static void RegisterUserPrefs(PrefServiceSyncable* prefs);
 
   // Extension Detail JSON Struct for page. |pages| is injected for unit
@@ skipping 35 matching lines @@
                        const content::NotificationDetails& details) OVERRIDE;
 
   // ExtensionUninstallDialog::Delegate implementation, used for receiving
   // notification about uninstall confirmation dialog selections.
   virtual void ExtensionUninstallAccepted() OVERRIDE;
   virtual void ExtensionUninstallCanceled() OVERRIDE;
 
   // extensions::ExtensionWarningService::Observer implementation.
   virtual void ExtensionWarningsChanged() OVERRIDE;
 
+  // ExtensionInstallPrompt::Delegate implementation.
+  virtual void InstallUIProceed() OVERRIDE;
+  virtual void InstallUIAbort(bool user_initiated) OVERRIDE;
+
   // Helper method that reloads all unpacked extensions.
   void ReloadUnpackedExtensions();
 
   // Callback for "requestExtensionsData" message.
   void HandleRequestExtensionsData(const base::ListValue* args);
 
   // Callback for "toggleDeveloperMode" message.
   void HandleToggleDeveloperMode(const base::ListValue* args);
 
   // Callback for "inspect" message.
@@ skipping 16 matching lines @@
 
   // Callback for "allowFileAcces" message.
   void HandleAllowFileAccessMessage(const base::ListValue* args);
 
   // Callback for "uninstall" message.
   void HandleUninstallMessage(const base::ListValue* args);
 
   // Callback for "options" message.
   void HandleOptionsMessage(const base::ListValue* args);
 
+  // Callback for "permissions" message.
+  void HandlePermissionsMessage(const base::ListValue* args);
+
   // Callback for "showButton" message.
   void HandleShowButtonMessage(const base::ListValue* args);
 
   // Callback for "autoupdate" message.
   void HandleAutoUpdateMessage(const base::ListValue* args);
 
   // Callback for "loadUnpackedExtension" message.
   void HandleLoadUnpackedExtensionMessage(const base::ListValue* args);
 
   // Utility for calling JavaScript window.alert in the page.
@@ skipping 68 matching lines @@
   content::NotificationRegistrar registrar_;
 
   PrefChangeRegistrar pref_registrar_;
   PrefChangeRegistrar local_state_pref_registrar_;
 
   // This will not be empty when a requirements check is in progress. Doing
   // another Check() before the previous one is complete will cause the first
   // one to abort.
   scoped_ptr<extensions::RequirementsChecker> requirements_checker_;
 
+  // The UI for showing what permissions the extension has.
+  scoped_ptr<ExtensionInstallPrompt> prompt_;
+
   ScopedObserver<extensions::ExtensionWarningService,
                  extensions::ExtensionWarningService::Observer>
       warning_service_observer_;
 
   DISALLOW_COPY_AND_ASSIGN(ExtensionSettingsHandler);
 };
 
 #endif  // CHROME_BROWSER_UI_WEBUI_EXTENSIONS_EXTENSION_SETTINGS_HANDLER_H_