Add a warning for missing fileBrowserHandler permission.

extensions/common/manifest_constants.cc

 // Copyright 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.
 
 #include "extensions/common/manifest_constants.h"
 
 namespace extensions {
 
 namespace manifest_keys {
 
@@ skipping 343 matching lines @@
 const char kInvalidExportWhitelist[] =
     "Invalid value for 'export.whitelist'.";
 const char kInvalidExportWhitelistString[] =
     "Invalid value for 'export.whitelist[*]'.";
 const char kInvalidFileAccessList[] =
     "Invalid value for 'file_access'.";
 const char kInvalidFileAccessValue[] =
     "Invalid value for 'file_access[*]'.";
 const char kInvalidFileBrowserHandler[] =
     "Invalid value for 'file_browser_handlers'.";
+const char kInvalidFileBrowserHandlerMissingPermission[] =
+    "Declaring file browser handlers requires the fileBrowserHandler manifest "
+    "permission.";
 const char kInvalidFileFiltersList[] =
     "Invalid value for 'file_filters'.";
 const char kInvalidFileFilterValue[] =
     "Invalid value for 'file_filters[*]'.";
 const char kInvalidFileHandlers[] =
     "Invalid value for 'file_handlers'.";
 const char kInvalidFileHandlersTooManyTypesAndExtensions[] =
     "Too many MIME and extension file_handlers have been declared.";
 const char kInvalidFileHandlerExtension[] =
     "Invalid value for 'file_handlers[*].extensions'.";
@@ skipping 316 matching lines @@
 const char kWebRequestConflictsWithLazyBackground[] =
     "The 'webRequest' API cannot be used with event pages.";
 #if defined(OS_CHROMEOS)
 const char kIllegalPlugins[] =
     "Extensions cannot install plugins on Chrome OS";
 #endif
 
 }  // namespace manifest_errors
 
 }  // namespace extensions