[Extensions] Propagate activeTab hosts to extension background pages

extensions/common/permissions/permissions_data.h

 // Copyright (c) 2013 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 EXTENSIONS_COMMON_PERMISSIONS_PERMISSIONS_DATA_H_
 #define EXTENSIONS_COMMON_PERMISSIONS_PERMISSIONS_DATA_H_
 
 #include <map>
 #include <string>
 #include <vector>
@@ skipping 97 matching lines @@
   // Note this does not include APIs with no corresponding permission, like
   // "runtime" or "browserAction".
   // TODO(mpcomplete): drop the "API" from these names, it's confusing.
   bool HasAPIPermission(APIPermission::ID permission) const;
   bool HasAPIPermission(const std::string& permission_name) const;
   bool HasAPIPermissionForTab(int tab_id, APIPermission::ID permission) const;
   bool CheckAPIPermissionWithParam(
       APIPermission::ID permission,
       const APIPermission::CheckParam* param) const;
 
-  // TODO(rdevlin.cronin): GetEffectiveHostPermissions(), HasHostPermission(),
-  // and HasEffectiveAccessToAllHosts() are just forwards for the active
+  // Returns the effective hosts associated with the active permissions and the
+  // current tab permissions.
+  URLPatternSet GetEffectiveHostPermissions() const;
+
+  // TODO(rdevlin.cronin): HasHostPermission() and
+  // HasEffectiveAccessToAllHosts() are just forwards for the active
   // permissions. We should either get rid of these, and have callers use
   // active_permissions(), or should get rid of active_permissions(), and make
   // callers use PermissionsData for everything. We should not do both.
 
-  // Returns the effective hosts associated with the active permissions.
-  const URLPatternSet& GetEffectiveHostPermissions() const;
-
   // Whether the extension has access to the given |url|.
   bool HasHostPermission(const GURL& url) const;
 
   // Whether the extension has effective access to all hosts. This is true if
   // there is a content script that matches all hosts, if there is a host
   // permission grants access to all hosts (like <all_urls>) or an api
   // permission that effectively grants access to all hosts (e.g. proxy,
   // network, etc.)
   bool HasEffectiveAccessToAllHosts() const;
 
@@ skipping 131 matching lines @@
   mutable scoped_refptr<const PermissionSet> withheld_permissions_unsafe_;
 
   mutable TabPermissionsMap tab_specific_permissions_;
 
   DISALLOW_COPY_AND_ASSIGN(PermissionsData);
 };
 
 }  // namespace extensions
 
 #endif  // EXTENSIONS_COMMON_PERMISSIONS_PERMISSIONS_DATA_H_