Move ChromeRequirementsChecker to //extensions as a PreloadCheck

chrome/browser/extensions/crx_installer.cc

Index: chrome/browser/extensions/crx_installer.cc
diff --git a/chrome/browser/extensions/crx_installer.cc b/chrome/browser/extensions/crx_installer.cc
index 2bf7570f7304e7b13ae5c092f5f010b862a0eb1f..de11a84fe2c9fe2e676f3a72b0824168fdfa173f 100644
--- a/chrome/browser/extensions/crx_installer.cc
+++ b/chrome/browser/extensions/crx_installer.cc
@@ -526,12 +526,11 @@ void CrxInstaller::OnInstallChecksComplete(int failed_checks) {
     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(), " "))));
+      ReportFailureFromUIThread(CrxInstallError(
+          CrxInstallError::ERROR_DECLINED,
+          base::UTF8ToUTF16(install_checker_->requirements_error_message())));
       return;
     }
     install_flags_ |= kInstallFlagHasRequirementErrors;