Componentize ComponentUpdater: Remove erroneous task runner DCHECK in DefaultComponentInstaller.

chrome/browser/component_updater/default_component_installer.cc

 // Copyright 2013 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 "base/bind.h"
 #include "base/file_util.h"
 #include "base/files/file_enumerator.h"
 #include "base/files/file_path.h"
 #include "base/location.h"
 #include "base/message_loop/message_loop_proxy.h"
@@ skipping 56 matching lines @@
     return false;
   if (!installer_traits_->OnCustomInstall(manifest, install_path))
     return false;
   if (!installer_traits_->VerifyInstallation(install_path))
     return false;
   return true;
 }
 
 bool DefaultComponentInstaller::Install(const base::DictionaryValue& manifest,
                                         const base::FilePath& unpack_path) {
-  DCHECK(task_runner_);
-  DCHECK(task_runner_->RunsTasksOnCurrentThread());
   std::string manifest_version;
   manifest.GetStringASCII("version", &manifest_version);
   base::Version version(manifest_version.c_str());
   if (!version.IsValid())
     return false;
   if (current_version_.CompareTo(version) > 0)
     return false;
   base::FilePath install_path =
       installer_traits_->GetBaseDirectory().AppendASCII(version.GetString());
   if (base::PathExists(install_path)) {
@@ skipping 132 matching lines @@
 
   if (current_version_.CompareTo(base::Version(kNullVersion)) > 0) {
     scoped_ptr<base::DictionaryValue> manifest_copy(
         current_manifest_->DeepCopy());
     installer_traits_->ComponentReady(
         current_version_, GetInstallDirectory(), manifest_copy.Pass());
   }
 }
 
 }  // namespace component_updater