Display the extension id and name when its installation is refused by policy.

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 "base/bind.h"
@@ skipping 332 matching lines @@
       ->IsExtensionBlacklisted(extension_->id())) {
     VLOG(1) << "This extension: " << extension_->id()
             << " is blacklisted. Install failed.";
     ReportFailureFromUIThread(
         l10n_util::GetStringUTF16(IDS_EXTENSION_CANT_INSTALL_BLACKLISTED));
     return;
   }
 
   if (!frontend_weak_->extension_prefs()->IsExtensionAllowedByPolicy(
           extension_->id(), install_source_)) {
-    ReportFailureFromUIThread(
-        l10n_util::GetStringUTF16(IDS_EXTENSION_CANT_INSTALL_POLICY_BLACKLIST));
+    ReportFailureFromUIThread(l10n_util::GetStringFUTF16(
+        IDS_EXTENSION_CANT_INSTALL_POLICY_BLACKLIST,
+        UTF8ToUTF16(extension_->name()),
+        UTF8ToUTF16(extension_->id())));
     return;
   }
 
   GURL overlapping_url;
   const Extension* overlapping_extension =
       frontend_weak_->extensions()->
       GetHostedAppByOverlappingWebExtent(extension_->web_extent());
   if (overlapping_extension &&
       overlapping_extension->id() != extension_->id()) {
     ReportFailureFromUIThread(l10n_util::GetStringFUTF16(
@@ skipping 185 matching lines @@
   // Some users (such as the download shelf) need to know when a
   // CRXInstaller is done.  Listening for the EXTENSION_* events
   // is problematic because they don't know anything about the
   // extension before it is unpacked, so they cannot filter based
   // on the extension.
   content::NotificationService::current()->Notify(
       chrome::NOTIFICATION_CRX_INSTALLER_DONE,
       content::Source<CrxInstaller>(this),
       content::Details<const Extension>(extension));
 }