Log additional information to try and track down a crash.

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 492 matching lines @@
   // TODO(rdevlin.cronin): Continue removing std::string errors and replacing
   // with string16
   std::string extension_id = extension_->id();
   std::string error;
   extension_ = extension_file_util::LoadExtension(
       version_dir,
       install_source_,
       extension_->creation_flags() | Extension::REQUIRE_KEY,
       &error);
 
-  LOG_ASSERT(error.empty()) << error << " " << extension_id << " "
-                            << download_url_.spec();
+  if (extension_) {
+    ReportSuccessFromFileThread();
+  } else {
+    LOG(ERROR) << error << " " << extension_id << " " << download_url_.spec();
+    ReportFailureFromFileThread(CrxInstallerError(UTF8ToUTF16(error)));
+  }
 
-  ReportSuccessFromFileThread();
 }
 
 void CrxInstaller::ReportFailureFromFileThread(const CrxInstallerError& error) {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::FILE));
   if (!BrowserThread::PostTask(
           BrowserThread::UI, FROM_HERE,
           base::Bind(&CrxInstaller::ReportFailureFromUIThread, this, error))) {
     NOTREACHED();
   }
 }
@@ skipping 85 matching lines @@
   // 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));
 }
 
 }  // namespace extensions