The component update checks should include the amount of installed memory.

chrome/browser/component_updater/component_updater_utils.h

 // Copyright 2013 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_BROWSER_COMPONENT_UPDATER_COMPONENT_UPDATER_UTILS_H_
 #define CHROME_BROWSER_COMPONENT_UPDATER_COMPONENT_UPDATER_UTILS_H_
 
 #include <string>
 
 struct CrxComponent;
@@ skipping 16 matching lines @@
 // An update protocol request starts with a common preamble which includes
 // version and platform information for Chrome and the operating system,
 // followed by a request body, which is the actual payload of the request.
 // For example:
 //
 // <?xml version="1.0" encoding="UTF-8"?>
 // <request protocol="3.0" version="chrome-32.0.1.0"  prodversion="32.0.1.0"
 //        requestid="{7383396D-B4DD-46E1-9104-AAC6B918E792}"
 //        updaterchannel="canary" arch="x86" nacl_arch="x86-64"
 //        ADDITIONAL ATTRIBUTES>
+//   <hw physmemory="16"/>
 //   <os platform="win" version="6.1" arch="x86"/>
 //   ... REQUEST BODY ...
 // </request>
 
 // Builds a protocol request string by creating the outer envelope for
 // the request and including the request body specified as a parameter.
 // If specified, |additional_attributes| are appended as attributes of the
 // request element. The additional attributes have to be well-formed for
 // insertion in the request element.
 std::string BuildProtocolRequest(const std::string& request_body,
@@ skipping 28 matching lines @@
 // Returns true if the file and the empty directory are deleted.
 bool DeleteFileAndEmptyParentDirectory(const base::FilePath& filepath);
 
 // Returns the component id of the |component|. The component id is in a
 // format similar with the format of an extension id.
 std::string GetCrxComponentID(const CrxComponent& component);
 
 }  // namespace component_updater
 
 #endif  // CHROME_BROWSER_COMPONENT_UPDATER_COMPONENT_UPDATER_UTILS_H_