Add "64-bit" to Chrome's 'about' page.

chrome/browser/ui/webui/help/help_handler.cc

 // 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.
 
 #include "chrome/browser/ui/webui/help/help_handler.h"
 
 #include <string>
 
 #include "base/basictypes.h"
 #include "base/bind.h"
@@ skipping 61 matching lines @@
       chrome::VersionInfo::GetVersionStringModifier();
   if (!version_modifier.empty())
     browser_version += " " + version_modifier;
 
 #if !defined(GOOGLE_CHROME_BUILD)
   browser_version += " (";
   browser_version += version_info.LastChange();
   browser_version += ")";
 #endif
 
+#if defined(ARCH_CPU_64_BITS)
+  browser_version += " (64-bit)";
+#endif
+
   return base::UTF8ToUTF16(browser_version);
 }
 
 #if defined(OS_CHROMEOS)
 
 // Returns message that informs user that for update it's better to
 // connect to a network of one of the allowed types.
 base::string16 GetAllowedConnectionTypesMessage() {
   if (help_utils_chromeos::IsUpdateOverCellularAllowed()) {
     return l10n_util::GetStringUTF16(IDS_UPGRADE_NETWORK_LIST_CELLULAR_ALLOWED);
@@ skipping 453 matching lines @@
   web_ui()->CallJavascriptFunction(
       "help.HelpPage.updateCurrentChannel", base::StringValue(channel));
 }
 
 void HelpHandler::OnTargetChannel(const std::string& channel) {
   web_ui()->CallJavascriptFunction(
       "help.HelpPage.updateTargetChannel", base::StringValue(channel));
 }
 
 #endif // defined(OS_CHROMEOS)