Add the Chrome version as one of the things we check to see if...

ceee/ie/common/ceee_module_util.h

 // Copyright (c) 2010 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.
 //
 // CEEE module-wide utilities.
 
 #ifndef CEEE_IE_COMMON_TOOLBAND_MODULE_UTIL_H__
 #define CEEE_IE_COMMON_TOOLBAND_MODULE_UTIL_H__
 
 #include <wtypes.h>
@@ skipping 33 matching lines @@
 // installed.
 //
 // If the returned path does not have a .crx extension, it should be
 // assumed to be an exploded extension directory rather than a .crx
 std::wstring GetExtensionPath();
 
 // Return the path and time of the last installation that occurred.
 FilePath GetInstalledExtensionPath();
 base::Time GetInstalledExtensionTime();
 
-// Return true if the extension is outdated compared to the registry
+// Return true if extension installation should be attempted according
+// to the registry. Note that Chrome will silently fail installation of
+// an extension version older than what is already installed.
 bool NeedToInstallExtension();
 
-// Install an extension and sets the right registry values
+// Sets the right registry values to cache the fact that we asked
+// Chrome to install an extension.
 void SetInstalledExtensionPath(const FilePath& path);
 
 // Returns true if the given path ends with .crx or is empty (as an
 // unset "what to load/install" preference means we should expect
 // an extension to already be installed).
 bool IsCrxOrEmpty(const std::wstring& path);
 
 // Stores/reads a registry entry that tracks whether the user has made the
 // toolband visible or hidden.
 void SetOptionToolbandIsHidden(bool isHidden);
@@ skipping 24 matching lines @@
 
 // The name of the Internet Explorer executable.
 extern const wchar_t kInternetExplorerModuleName[];
 
 // The name of the CEEE Broker executable.
 extern const wchar_t kCeeeBrokerModuleName[];
 
 }  // namespace
 
 #endif  // CEEE_IE_COMMON_TOOLBAND_MODULE_UTIL_H__