Makes the component installers return a Result instead of a bool.

chrome/browser/component_updater/ev_whitelist_component_installer.cc

 // Copyright 2014 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/component_updater/ev_whitelist_component_installer.h"
 
 #include <memory>
 #include <string>
 #include <utility>
 #include <vector>
@@ skipping 63 matching lines @@
 
 bool EVWhitelistComponentInstallerTraits::
     SupportsGroupPolicyEnabledComponentUpdates() const {
   return false;
 }
 
 bool EVWhitelistComponentInstallerTraits::RequiresNetworkEncryption() const {
   return false;
 }
 
-bool EVWhitelistComponentInstallerTraits::OnCustomInstall(
+update_client::CrxInstaller::Result
+EVWhitelistComponentInstallerTraits::OnCustomInstall(
     const base::DictionaryValue& manifest,
     const base::FilePath& install_dir) {
   VLOG(1) << "Entering EVWhitelistComponentInstallerTraits::OnCustomInstall.";
 
-  return true;  // Nothing custom here.
+  return update_client::CrxInstaller::Result(0);  // Nothing custom here.
 }
 
 base::FilePath EVWhitelistComponentInstallerTraits::GetInstalledPath(
     const base::FilePath& base) {
   // EV whitelist is encoded the same way for all platforms
   return base.Append(FILE_PATH_LITERAL("_platform_specific"))
       .Append(FILE_PATH_LITERAL("all"))
       .Append(kCompressedEVWhitelistFileName);
 }
 
@@ skipping 53 matching lines @@
   DefaultComponentInstaller* installer =
       new DefaultComponentInstaller(std::move(traits));
   installer->Register(cus, base::Closure());
 
   content::BrowserThread::PostAfterStartupTask(
       FROM_HERE, content::BrowserThread::GetBlockingPool(),
       base::Bind(&DeleteWhitelistCopy, user_data_dir));
 }
 
 }  // namespace component_updater