Enforce the 'requirements' field in manifests.

chrome/browser/chromeos/extensions/file_manager_util.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/chromeos/extensions/file_manager_util.h"
 
 #include "base/bind.h"
 #include "base/file_util.h"
 #include "base/json/json_reader.h"
 #include "base/json/json_writer.h"
 #include "base/logging.h"
@@ skipping 699 matching lines @@
 }
 
 void InstallCRX(Browser* browser, const FilePath& path) {
   ExtensionService* service = browser->profile()->GetExtensionService();
   CHECK(service);
 
   scoped_refptr<extensions::CrxInstaller> installer(
       extensions::CrxInstaller::Create(
           service,
           chrome::CreateExtensionInstallPromptWithBrowser(browser)));
+  installer->set_error_on_unsported_requirements(true);
   installer->set_is_gallery_install(false);
   installer->set_allow_silent_install(false);
   installer->InstallCrx(path);
 }
 
 // If pdf plugin is enabled, we should open pdf files in a tab.
 bool ShouldBeOpenedWithPdfPlugin(Profile* profile, const char* file_extension) {
   if (base::strcasecmp(file_extension, kPdfExtension) != 0)
     return false;
 
@@ skipping 19 matching lines @@
           OperationRegistry::ProgressStatus>::const_iterator iter =
               list.begin();
        iter != list.end(); ++iter) {
     result_list->Append(
         ProgessStatusToDictionaryValue(profile, origin_url, *iter));
   }
   return result_list.release();
 }
 
 }  // namespace file_manager_util