Uninstall multi-install Chrome Frame when updated.

chrome/installer/util/util_constants.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.
 //
 // Defines all install related constants that need to be used by Chrome as
 // well as Chrome Installer.
 
 #ifndef CHROME_INSTALLER_UTIL_UTIL_CONSTANTS_H_
 #define CHROME_INSTALLER_UTIL_UTIL_CONSTANTS_H_
 
@@ skipping 109 matching lines @@
   REFRESHING_POLICY,           // 9: Refreshing the elevation policy.
   UPDATING_CHANNELS,           // 10: Updating channel information.
   COPYING_PREFERENCES_FILE,    // 11: Copying preferences file.
   CREATING_SHORTCUTS,          // 12: Creating shortcuts.
   REGISTERING_CHROME,          // 13: Performing Chrome registration.
   REMOVING_OLD_VERSIONS,       // 14: Deleting old version directories.
   FINISHING,                   // 15: Finishing the install.
   CONFIGURE_AUTO_LAUNCH,       // 16: Configuring Chrome to auto-launch.
   CREATING_VISUAL_MANIFEST,    // 17: Creating VisualElementsManifest.xml
   DEFERRING_TO_HIGHER_VERSION,  // 18: Deferring to an installed higher version.
-  NUM_STAGES                   // 19: The number of stages.
+  UNINSTALLING_BINARIES,       // 19: Uninstalling unused binaries.
+  UNINSTALLING_CHROME_FRAME,   // 20: Uninstalling multi-install Chrome Frame.
+  NUM_STAGES                   // 21: The number of stages.
 };
 
 // When we start reporting the numerical values from the enum, the order
 // above MUST be preserved.
-COMPILE_ASSERT(DEFERRING_TO_HIGHER_VERSION == 18,
+COMPILE_ASSERT(UNINSTALLING_CHROME_FRAME == 20,
                never_ever_ever_change_InstallerStage_values_bang);
 
 namespace switches {
 
 extern const char kAutoLaunchChrome[];
 extern const char kChrome[];
 extern const char kChromeAppHostDeprecated[];  // TODO(huangs): Remove by M27.
 extern const char kChromeAppLauncher[];
 extern const char kChromeFrame[];
 extern const char kChromeFrameQuickEnable[];
@@ skipping 114 matching lines @@
 const int kCourgetteErrorOffset = 300;
 const int kBsdiffErrorOffset = 600;
 
 // Arguments to --patch switch
 extern const char kCourgette[];
 extern const char kBsdiff[];
 
 }  // namespace installer
 
 #endif  // CHROME_INSTALLER_UTIL_UTIL_CONSTANTS_H_