[Mac] Add a preference for the tab key cycling between just form fields, or links as well.

chrome/browser/tab_contents/render_view_host_delegate_helper.cc

 // 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.
 
 #include "chrome/browser/tab_contents/render_view_host_delegate_helper.h"
 
 #include "base/command_line.h"
 #include "base/string_util.h"
 #include "chrome/browser/browser.h"
 #include "chrome/browser/character_encoding.h"
@@ skipping 172 matching lines @@
       WideToASCII(prefs->GetString(prefs::kDefaultCharset));
 
   web_prefs.javascript_can_open_windows_automatically =
       prefs->GetBoolean(prefs::kWebKitJavascriptCanOpenWindowsAutomatically);
   web_prefs.dom_paste_enabled =
       prefs->GetBoolean(prefs::kWebKitDomPasteEnabled);
   web_prefs.shrinks_standalone_images_to_fit =
       prefs->GetBoolean(prefs::kWebKitShrinksStandaloneImagesToFit);
   web_prefs.inspector_settings = WideToUTF8(
       prefs->GetString(prefs::kWebKitInspectorSettings));
+  web_prefs.tabs_to_links = prefs->GetBoolean(prefs::kWebkitTabsToLinks);
 
   {  // Command line switches are used for preferences with no user interface.
     const CommandLine& command_line = *CommandLine::ForCurrentProcess();
     web_prefs.developer_extras_enabled =
         !command_line.HasSwitch(switches::kDisableDevTools);
     web_prefs.javascript_enabled =
         !command_line.HasSwitch(switches::kDisableJavaScript) &&
         prefs->GetBoolean(prefs::kWebKitJavascriptEnabled);
     web_prefs.web_security_enabled =
         !command_line.HasSwitch(switches::kDisableWebSecurity) &&
@@ skipping 53 matching lines @@
   }
   DCHECK(!web_prefs.default_encoding.empty());
 
   if (is_dom_ui) {
     web_prefs.loads_images_automatically = true;
     web_prefs.javascript_enabled = true;
   }
 
   return web_prefs;
 }