Uninstall multi-install Chrome Frame when updated.

chrome/installer/util/installer_state.h

Index: chrome/installer/util/installer_state.h
diff --git a/chrome/installer/util/installer_state.h b/chrome/installer/util/installer_state.h
index ffff1eef98fce24864f2df6589e199c37d1c8e77..17598da5f1dfddb427a6bbac66a81a696eb86641 100644
--- a/chrome/installer/util/installer_state.h
+++ b/chrome/installer/util/installer_state.h
@@ -226,6 +226,9 @@ class InstallerState {
   // access.
   static bool IsFileInUse(const base::FilePath& file);
 
+  // Clears the instance to an uninitialized state.
+  void Clear();

[robertshield, 2013/11/29 18:50:25]

Can we add a unit test for Clear()?

[grt (UTC plus 2), 2013/12/02 15:28:31]

I've added one for re-initializing an instance.

+
   // Returns true if any file corresponding to a bit in |file_bits| (from the
   // enum above) for the currently installed version exists and is in use.
   bool AnyExistsAndIsInUse(const InstallationState& machine_state,