[Extensions] Propagate activeTab hosts to extension background pages

extensions/common/permissions/permissions_data.h

Index: extensions/common/permissions/permissions_data.h
diff --git a/extensions/common/permissions/permissions_data.h b/extensions/common/permissions/permissions_data.h
index ba2f3c3aa54078bbca0e1843e7fc2ec9942e3e70..74af40e9d10f078649609a3cd4c53148995b5e4b 100644
--- a/extensions/common/permissions/permissions_data.h
+++ b/extensions/common/permissions/permissions_data.h
@@ -115,15 +115,16 @@ class PermissionsData {
       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;