Fixed file_version_info so that it finds Mac values correctly.

chrome/browser/extensions/extension_updater.cc

 // Copyright (c) 2010 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/extensions/extension_updater.h"
 
 #include <algorithm>
 #include <set>
 
 #include "base/logging.h"
@@ skipping 809 matching lines @@
           update_version->CompareTo(*(existing_version.get())) <= 0) {
         continue;
       }
     }
 
     // If the update specifies a browser minimum version, do we qualify?
     if (update->browser_min_version.length() > 0) {
       // First determine the browser version if we haven't already.
       if (!browser_version.get()) {
         chrome::VersionInfo version_info;
-        if (version_info.is_valid()) {
-          browser_version.reset(Version::GetVersionFromString(
-                                    version_info.Version()));
-        }
+        browser_version.reset(Version::GetVersionFromString(
+                                  version_info.Version()));
       }
       scoped_ptr<Version> browser_min_version(
           Version::GetVersionFromString(update->browser_min_version));
       if (browser_version.get() && browser_min_version.get() &&
           browser_min_version->CompareTo(*browser_version.get()) > 0) {
         // TODO(asargent) - We may want this to show up in the extensions UI
         // eventually. (http://crbug.com/12547).
         LOG(WARNING) << "Updated version of extension " << update->extension_id
           << " available, but requires chrome version "
           << update->browser_min_version;
@@ skipping 61 matching lines @@
         URLFetcher::Create(kExtensionFetcherId, url, URLFetcher::GET, this));
     extension_fetcher_->set_request_context(
         Profile::GetDefaultRequestContext());
     extension_fetcher_->set_load_flags(net::LOAD_DO_NOT_SEND_COOKIES |
                                        net::LOAD_DO_NOT_SAVE_COOKIES |
                                        net::LOAD_DISABLE_CACHE);
     extension_fetcher_->Start();
     current_extension_fetch_ = ExtensionFetch(id, url, hash, version);
   }
 }