Uninstall multi-install Chrome Frame when updated.

chrome/installer/util/installer_state.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.
 
 #ifndef CHROME_INSTALLER_UTIL_INSTALLER_STATE_H_
 #define CHROME_INSTALLER_UTIL_INSTALLER_STATE_H_
 
 #include <set>
 #include <string>
 #include <vector>
@@ skipping 208 matching lines @@
     CHROME_FRAME_DLL        = 1 << 0,
     CHROME_FRAME_HELPER_EXE = 1 << 1,
     CHROME_DLL              = 1 << 2,
     NUM_BINARIES            = 3
   };
 
   // Returns true if |file| exists and cannot be opened for exclusive write
   // 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,
                            uint32 file_bits) const;
   base::FilePath GetDefaultProductInstallPath(BrowserDistribution* dist) const;
   bool CanAddProduct(const Product& product,
                      const base::FilePath* product_dir) const;
   Product* AddProductInDirectory(const base::FilePath* product_dir,
                                  scoped_ptr<Product>* product);
   Product* AddProductFromPreferences(
@@ skipping 31 matching lines @@
   bool verbose_logging_;
   bool ensure_google_update_present_;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(InstallerState);
 };  // class InstallerState
 
 }  // namespace installer
 
 #endif  // CHROME_INSTALLER_UTIL_INSTALLER_STATE_H_