Enforce the 'requirements' field in manifests.

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 "chrome/browser/api/prefs/pref_change_registrar.h"
 #include "chrome/browser/extensions/extension_install_ui.h"
 #include "chrome/browser/extensions/extension_uninstall_dialog.h"
 #include "chrome/browser/extensions/extension_warning_set.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"
 #include "content/public/browser/web_ui_message_handler.h"
 #include "googleurl/src/gurl.h"
 #include "ui/base/dialogs/select_file_dialog.h"
 
@@ skipping 21 matching lines @@
         render_process_id(render_process_id),
         render_view_id(render_view_id),
         incognito(incognito) {}
   GURL url;
   int render_process_id;
   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 ExtensionUninstallDialog::Delegate {
+class ExtensionSettingsHandler
+    : public content::WebUIMessageHandler,
+      public content::NotificationObserver,
+      public content::WebContentsObserver,
+      public ui::SelectFileDialog::Listener,
+      public ExtensionUninstallDialog::Delegate,
+      public base::SupportsWeakPtr<ExtensionSettingsHandler>{
  public:
   ExtensionSettingsHandler();
   virtual ~ExtensionSettingsHandler();
 
   static void RegisterUserPrefs(PrefService* prefs);
 
   // Extension Detail JSON Struct for page. |pages| is injected for unit
   // testing.
   // Note: |warning_set| can be NULL in unit tests.
   base::DictionaryValue* CreateExtensionDetailValue(
@@ skipping 95 matching lines @@
       const std::set<content::RenderViewHost*>& views,
       std::vector<ExtensionPage> *result);
 
   // Returns the ExtensionUninstallDialog object for this class, creating it if
   // needed.
   ExtensionUninstallDialog* GetExtensionUninstallDialog();
 
   // Helper to inspect an ExtensionHost after it has been loaded.
   void InspectExtensionHost(extensions::ExtensionHost* host);
 
+  // Callback for RequirementsChecker.
+  void OnRequirementsChecked(std::string extension_id,
+                             std::vector<std::string> requirement_errors);
+
   // Our model.  Outlives us since it's owned by our containing profile.
   ExtensionService* extension_service_;
 
   // A convenience member, filled once the extension_service_ is known.
   extensions::ManagementPolicy* management_policy_;
 
   // Used to pick the directory when loading an extension.
   scoped_refptr<ui::SelectFileDialog> load_extension_dialog_;
 
   // Used to start the |load_extension_dialog_| in the last directory that was
@@ skipping 22 matching lines @@
   // once to the page, otherwise we'd be calling JavaScript functions on objects
   // that don't exist yet when notifications come in. This variable makes sure
   // we do so only once.
   bool registered_for_notifications_;
 
   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_;
+
   DISALLOW_COPY_AND_ASSIGN(ExtensionSettingsHandler);
 };
 
 #endif  // CHROME_BROWSER_UI_WEBUI_EXTENSIONS_EXTENSION_SETTINGS_HANDLER_H_