When critical updates have been installed and the user has been idle for quite some time, show a ...

chrome/installer/util/install_util.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.
 //
 // See the corresponding header file for description of the functions in this
 // file.
 
 #include "chrome/installer/util/install_util.h"
 
 #include <shellapi.h>
@@ skipping 175 matching lines @@
     ret = Version::GetVersionFromString(WideToASCII(version_str));
   } else {
     DCHECK_EQ(ERROR_FILE_NOT_FOUND, result);
     VLOG(1) << "No existing " << dist->GetApplicationName()
             << " install found.";
   }
 
   return ret;
 }
 
+Version* InstallUtil::GetCriticalUpdateVersion(BrowserDistribution* dist) {
+  DCHECK(dist);
+  RegKey key;
+  LONG result =
+      key.Open(HKEY_CURRENT_USER, dist->GetVersionKey().c_str(), KEY_READ);
+
+  string16 version_str;
+  if (result == ERROR_SUCCESS)
+    result = key.ReadValue(google_update::kRegCriticalUpdateField,
+                           &version_str);
+
+  Version* ret = NULL;
+  if (result == ERROR_SUCCESS && !version_str.empty()) {
+    VLOG(1) << "Critical Update version for " << dist->GetApplicationName()
+            << " found " << version_str;
+    ret = Version::GetVersionFromString(WideToASCII(version_str));
+  } else {
+    DCHECK_EQ(ERROR_FILE_NOT_FOUND, result);
+    VLOG(1) << "No existing " << dist->GetApplicationName()
+            << " install found.";
+  }
+
+  return ret;
+}
+
 bool InstallUtil::IsOSSupported() {
   // We do not support Win2K or older, or XP without service pack 2.
   VLOG(1) << base::SysInfo::OperatingSystemName() << ' '
           << base::SysInfo::OperatingSystemVersion();
   base::win::Version version = base::win::GetVersion();
   return (version > base::win::VERSION_XP) ||
       ((version == base::win::VERSION_XP) &&
        (base::win::OSInfo::GetInstance()->service_pack().major >= 2));
 }
 
@@ skipping 231 matching lines @@
   int len = GetDateFormatW(LOCALE_INVARIANT, 0, NULL, kDateFormat,
                            date_str, arraysize(date_str));
   if (len) {
     --len;  // Subtract terminating \0.
   } else {
     PLOG(DFATAL) << "GetDateFormat";
   }
 
   return std::wstring(date_str, len);
 }