Support 32-bit subversion fields in base::Version.

chrome/browser/web_applications/web_app_mac.mm

 // Copyright (c) 2012 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.
 
 #import "chrome/browser/web_applications/web_app_mac.h"
 
 #import <Carbon/Carbon.h>
 #import <Cocoa/Cocoa.h>
 
 #include "base/command_line.h"
@@ skipping 484 matching lines @@
     shortcut_info.profile_path = user_data_dir.Append(profile_base_name);
 
   return shortcut_info;
 }
 
 web_app::ShortcutInfo RecordAppShimErrorAndBuildShortcutInfo(
     const base::FilePath& bundle_path) {
   NSDictionary* plist = ReadPlist(GetPlistPath(bundle_path));
   base::Version full_version(base::SysNSStringToUTF8(
       [plist valueForKey:app_mode::kCFBundleShortVersionStringKey]));
-  int major_version = 0;
+  uint32_t major_version = 0;
   if (full_version.IsValid())
     major_version = full_version.components()[0];
   UMA_HISTOGRAM_SPARSE_SLOWLY("Apps.AppShimErrorVersion", major_version);
 
   return BuildShortcutInfoFromBundle(bundle_path);
 }
 
 void UpdateFileTypes(NSMutableDictionary* plist,
                      const extensions::FileHandlersInfo& file_handlers_info) {
   NSMutableArray* document_types =
@@ skipping 676 matching lines @@
   web_app::GetShortcutInfoForApp(
       app,
       profile,
       base::Bind(&web_app::CreateAppShortcutInfoLoaded,
                  profile,
                  app,
                  close_callback));
 }
 
 }  // namespace chrome