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

components/update_client/utils.h

 // 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.
 
 #ifndef COMPONENTS_UPDATE_CLIENT_UTILS_H_
 #define COMPONENTS_UPDATE_CLIENT_UTILS_H_
 
 #include <memory>
 #include <string>
 #include <utility>
 #include <vector>
 
-#include "base/callback_forward.h"
-#include "components/update_client/update_client.h"
 
 class GURL;
 
 namespace base {
-class DictionaryValue;
 class FilePath;
 }
 
 namespace net {
 class URLFetcher;
 class URLFetcherDelegate;
 class URLRequestContextGetter;
 }
 
 namespace update_client {
@@ skipping 80 matching lines @@
 bool IsValidBrand(const std::string& brand);
 
 // Returns true if the name part of the |attr| parameter matches
 // ^[-_a-zA-Z0-9]{1,256}$ and the value part of the |attr| parameter
 // matches ^[-.,;+_=a-zA-Z0-9]{0,256}$ .
 bool IsValidInstallerAttribute(const InstallerAttribute& attr);
 
 // Removes the unsecure urls in the |urls| parameter.
 void RemoveUnsecureUrls(std::vector<GURL>* urls);
 
-// Adapter function for the old definitions of CrxInstaller::Install until the
-// component installer code is migrated to use a REsult instead of bool.
-CrxInstaller::Result InstallFunctionWrapper(base::Callback<bool()> callback);
-
 }  // namespace update_client
 
 #endif  // COMPONENTS_UPDATE_CLIENT_UTILS_H_