Bump os-upgrade component of Active Setup version on-os-upgrade.

chrome/installer/util/install_util.h

 // 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.
 //
 // This file declares utility functions for the installer. The original reason
 // for putting these functions in installer\util library is so that we can
 // separate out the critical logic and write unit tests for it.
 
 #ifndef CHROME_INSTALLER_UTIL_INSTALL_UTIL_H_
 #define CHROME_INSTALLER_UTIL_INSTALL_UTIL_H_
@@ skipping 14 matching lines @@
 
 namespace base {
 class Version;
 }
 
 // This is a utility class that provides common installation related
 // utility methods that can be used by installer and also unit tested
 // independently.
 class InstallUtil {
  public:
+  // The components of the Active Setup Version entry, in order.
+  enum ActiveSetupVersionComponent {
+    // The major version.
+    MAJOR,
+    // Unused component, always 0 for now.
+    UNUSED1,
+    // Number of OS upgrades handled since original install.
+    OS_UPGRADES,
+    // Unused component, always 0 for now.
+    UNUSED2,
+  };
+
+  // The set of operations that can be performed on an
+  // ActiveSetupVersionComponent.
+  enum ActiveSetupVersionOperation {
+    // Sets the ActiveSetupVersionComponent operated on to the value specified.
+    SET,
+    // Bumps the ActiveSetupVersionComponent operated on by the value specified.
+    BUMP,
+  };
+
+  // Returns the updated Active Setup version once |operation|+|value| is
+  // applied to |component| of |existing_version|.
+  static base::string16 GetActiveSetupVersionFromExisting(
+      ActiveSetupVersionComponent component,
+      ActiveSetupVersionOperation operation,
+      int value,
+      const base::string16& existing_version);
+
+  // Updates the Active Setup version for |dist| as dictated by |component|,
+  // |operation|, and |value|. Requires an Active Setup version to already be
+  // installed for |dist|. Returns true on success.
+  static bool UpdateActiveSetupVersion(BrowserDistribution* dist,
+                                       ActiveSetupVersionComponent component,
+                                       ActiveSetupVersionOperation operation,
+                                       int value);
+
   // Get the path to this distribution's Active Setup registry entries.
   // e.g. Software\Microsoft\Active Setup\Installed Components\<dist_guid>
   static base::string16 GetActiveSetupPath(BrowserDistribution* dist);
 
   // Attempts to trigger the command that would be run by Active Setup for a
   // system-level Chrome. For use only when system-level Chrome is installed.
   static void TriggerActiveSetupCommand();
 
   // Launches given exe as admin on Vista.
   static bool ExecuteExeAsAdmin(const base::CommandLine& cmd, DWORD* exit_code);
@@ skipping 161 matching lines @@
    private:
     DISALLOW_COPY_AND_ASSIGN(ProgramCompare);
   };  // class ProgramCompare
 
  private:
   DISALLOW_COPY_AND_ASSIGN(InstallUtil);
 };
 
 
 #endif  // CHROME_INSTALLER_UTIL_INSTALL_UTIL_H_