Support requesting subsets of host permissions using the permissions API.

chrome/browser/extensions/api/permissions/permissions_apitest.cc

 // 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.
 
 #include "chrome/browser/extensions/api/permissions/permissions_api.h"
 #include "chrome/browser/extensions/extension_apitest.h"
 #include "chrome/browser/extensions/extension_prefs.h"
 #include "chrome/browser/extensions/extension_service.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/ui/browser.h"
@@ skipping 137 matching lines @@
   // TODO(kalman): ugh, it would be nice to test this condition, but it seems
   // like there's somehow a race here where the prefs aren't updated in time
   // with the "allow file access" bit, so we'll just have to trust that
   // RunExtensionTest (unlike RunExtensionTestNoFileAccess) does indeed
   // not set the allow file access bit. Otherwise this test doesn't mean
   // a whole lot (i.e. file access works - but it'd better not be the case
   // that the extension actually has file access, since that'd be the bug
   // that this is supposed to be testing).
   //EXPECT_TRUE(prefs->AllowFileAccess("hlonmbgfjccgolnaboonlakjckinmhmd"));
 }
+
+// Test requesting, querying, and removing host permissions for host
+// permissions that are a subset of the optional permissions.
+IN_PROC_BROWSER_TEST_F(ExtensionApiTest, HostSubsets) {
+  PermissionsRequestFunction::SetAutoConfirmForTests(true);
+  PermissionsRequestFunction::SetIgnoreUserGestureForTests(true);
+  EXPECT_TRUE(RunExtensionTest("permissions/host_subsets")) << message_;
+}