Support asynchronous patching operations in the component updater.

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/values.h"
 #include "base/version.h"
@@ skipping 134 matching lines @@
       found = true;
     }
   }
 
   if (found) {
     current_version_ = latest_version;
     // TODO(ddorwin): Remove these members and pass them directly to
     // FinishRegistration().
     base::ReadFileToString(latest_dir.AppendASCII("manifest.fingerprint"),
                            &current_fingerprint_);
-    current_manifest_= ReadManifest(latest_dir);
+    current_manifest_= component_updater::ReadManifest(latest_dir);
     if (!current_manifest_) {
       DLOG(ERROR) << "Failed to read manifest for "
                   << installer_traits_->GetName() << " ("
                   << base_dir.MaybeAsASCII() << ").";
       return;
     }
   }
 
   // Remove older versions of the component. None should be in use during
   // browser startup.
@@ skipping 35 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());
   }
 }