Move ChromeRequirementsChecker to //extensions as a PreloadCheck

chrome/browser/extensions/crx_installer.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/crx_installer.h"
 
 #include <map>
 #include <set>
 #include <utility>
 
@@ skipping 508 matching lines @@
         base::Bind(&CrxInstaller::OnInstallChecksComplete, this));
   }
 }
 
 void CrxInstaller::OnInstallChecksComplete(int failed_checks) {
   DCHECK_CURRENTLY_ON(BrowserThread::UI);
   if (!service_weak_)
     return;
 
   // Check for requirement errors.
-  if (!install_checker_->requirement_errors().empty()) {
+  if (!install_checker_->requirements_error_message().empty()) {
     if (error_on_unsupported_requirements_) {
       ReportFailureFromUIThread(
           CrxInstallError(CrxInstallError::ERROR_DECLINED,
-                          base::UTF8ToUTF16(base::JoinString(
-                              install_checker_->requirement_errors(), " "))));
+                          install_checker_->requirements_error_message()));
       return;
     }
     install_flags_ |= kInstallFlagHasRequirementErrors;
   }
 
   // Check the blacklist state.
   if (install_checker_->blacklist_error() == PreloadCheck::BLACKLISTED_ID) {
     install_flags_ |= kInstallFlagIsBlacklistedForMalware;
   }
 
@@ skipping 17 matching lines @@
   // install it. In this case, ExtensionService::OnExtensionInstalled needs to
   // deal with it.
 
   // Check for policy errors.
   if (!install_checker_->policy_error().empty()) {
     // We don't want to show the error infobar for installs from the WebStore,
     // because the WebStore already shows an error dialog itself.
     // Note: |client_| can be NULL in unit_tests!
     if (extension()->from_webstore() && client_)
       client_->install_ui()->SetSkipPostInstallUI(true);
-    ReportFailureFromUIThread(
-        CrxInstallError(CrxInstallError::ERROR_DECLINED,
-                        base::UTF8ToUTF16(install_checker_->policy_error())));
+    ReportFailureFromUIThread(CrxInstallError(
+        CrxInstallError::ERROR_DECLINED, install_checker_->policy_error()));
     return;
   }
 
   ConfirmInstall();
 }
 
 void CrxInstaller::ConfirmInstall() {
   DCHECK_CURRENTLY_ON(BrowserThread::UI);
   ExtensionService* service = service_weak_.get();
   if (!service || service->browser_terminating())
@@ skipping 322 matching lines @@
         ExtensionInstallPrompt::GetReEnablePromptTypeForExtension(
             service->profile(), extension());
     client_->ShowDialog(base::Bind(&CrxInstaller::OnInstallPromptDone, this),
                         extension(), nullptr,
                         base::MakeUnique<ExtensionInstallPrompt::Prompt>(type),
                         ExtensionInstallPrompt::GetDefaultShowDialogCallback());
   }
 }
 
 }  // namespace extensions