Improve UI for unpacked extensions failing to load

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 737 matching lines @@
                   content::Source<CrxInstaller>(this),
                   content::Details<const base::string16>(&error.message()));
 
   // This isn't really necessary, it is only used because unit tests expect to
   // see errors get reported via this interface.
   //
   // TODO(aa): Need to go through unit tests and clean them up too, probably get
   // rid of this line.
   ExtensionErrorReporter::GetInstance()->ReportError(
       error.message(),
-      false,  // Be quiet.
-      NULL);  // Caller expects no response.
+      false);  // Be quiet.
 
   if (client_)
     client_->OnInstallFailure(error);
 
   NotifyCrxInstallComplete(false);
 
   // Delete temporary files.
   CleanupTempFiles();
 }
 
@@ skipping 124 matching lines @@
   if (!prefs->DidExtensionEscalatePermissions(extension()->id()))
     return;
 
   if (client_) {
     AddRef();  // Balanced in InstallUIProceed() and InstallUIAbort().
     client_->ConfirmReEnable(this, extension());
   }
 }
 
 }  // namespace extensions