WebRequest API should warn when a developer attempts to filter URLs without proper permissions

chrome/browser/extensions/extension_webrequest_api_constants.cc

 // Copyright (c) 2011 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/extension_webrequest_api_constants.h"
 
 namespace extension_webrequest_api_constants {
 
 const char kChallengerKey[] = "challenger";
 const char kErrorKey[] = "error";
@@ skipping 33 matching lines @@
 const char kOnResponseStarted[] = "webRequest.onResponseStarted";
 const char kOnSendHeaders[] = "webRequest.onSendHeaders";
 const char kOnAuthRequired[] = "webRequest.onAuthRequired";
 
 
 const char kInvalidRedirectUrl[] = "redirectUrl '*' is not a valid URL.";
 const char kInvalidBlockingResponse[] =
     "cancel cannot be true in the presence of other keys.";
 const char kInvalidRequestFilterUrl[] = "'*' is not a valid URL pattern.";
 const char kBlockingPermissionRequired[] =
-        "You do not have permission to use blocking webRequest listeners. "
-        "Be sure to declare the webRequestBlocking permission in your "
-        "manifest.";
+    "You do not have permission to use blocking webRequest listeners. "
+    "Be sure to declare the webRequestBlocking permission in your "
+    "manifest.";
+const char kHostPermissionsRequired[] =
+    "You need to request host permissions in the manifest file in order to "
+    "be notified about requests from the webRequest API.";
 
 }  // namespace extension_webrequest_api_constants