Modify UpdateLibrary to use async RequestUpdateCheck call

chrome/browser/chromeos/cros/update_library.cc

 // Copyright (c) 2011 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/chromeos/cros/update_library.h"
 
 #include "base/message_loop.h"
 #include "base/string_util.h"
 #include "chrome/browser/chromeos/cros/cros_library.h"
 #include "content/browser/browser_thread.h"
@@ skipping 18 matching lines @@
   }
 
   void AddObserver(Observer* observer) {
     observers_.AddObserver(observer);
   }
 
   void RemoveObserver(Observer* observer) {
     observers_.RemoveObserver(observer);
   }
 
-  bool CheckForUpdate() {
-    if (!CrosLibrary::Get()->EnsureLoaded())
-      return false;
-
-    return InitiateUpdateCheck();
+  void RequestUpdateCheck(chromeos::UpdateCallback callback, void* user_data) {
+    if (CrosLibrary::Get()->EnsureLoaded())
+      chromeos::RequestUpdateCheck(callback, user_data);
   }
 
   bool RebootAfterUpdate() {
     if (!CrosLibrary::Get()->EnsureLoaded())
       return false;
 
     return RebootIfUpdated();
   }
 
   bool SetReleaseTrack(const std::string& track) {
@@ skipping 58 matching lines @@
 
   DISALLOW_COPY_AND_ASSIGN(UpdateLibraryImpl);
 };
 
 class UpdateLibraryStubImpl : public UpdateLibrary {
  public:
   UpdateLibraryStubImpl() {}
   ~UpdateLibraryStubImpl() {}
   void AddObserver(Observer* observer) {}
   void RemoveObserver(Observer* observer) {}
-  bool CheckForUpdate() { return false; }
+  void RequestUpdateCheck(chromeos::UpdateCallback callback, void* user_data) {
+    if (callback)
+      callback(user_data, UPDATE_RESULT_FAILED, "stub update");
+  }
   bool RebootAfterUpdate() { return false; }
   bool SetReleaseTrack(const std::string& track) { return false; }
   std::string GetReleaseTrack() { return "beta-channel"; }
   const UpdateLibrary::Status& status() const {
     return status_;
   }
 
  private:
   Status status_;
 
   DISALLOW_COPY_AND_ASSIGN(UpdateLibraryStubImpl);
 };
 
 // static
 UpdateLibrary* UpdateLibrary::GetImpl(bool stub) {
   if (stub)
     return new UpdateLibraryStubImpl();
   else
     return new UpdateLibraryImpl();
 }
 
 }  // namespace chromeos
 
 // Allows InvokeLater without adding refcounting. This class is a Singleton and
 // won't be deleted until it's last InvokeLater is run.
 DISABLE_RUNNABLE_METHOD_REFCOUNT(chromeos::UpdateLibraryImpl);