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

chrome/installer/util/install_util.h

Index: chrome/installer/util/install_util.h
diff --git a/chrome/installer/util/install_util.h b/chrome/installer/util/install_util.h
index 5a2696747a82736a8d49138774e3647a49f12e4f..616b27a220e1c452f401717170ea8396a44be461 100644
--- a/chrome/installer/util/install_util.h
+++ b/chrome/installer/util/install_util.h
@@ -32,6 +32,43 @@ class Version;
 // 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);