Remember zoom on a per-host basis....

chrome/chrome_browser.gypi

 # Copyright (c) 2009 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.
 
 {
   'targets': [
     {
       'target_name': 'browser',
       'type': '<(library)',
       'msvs_guid': '5BF908A7-68FB-4A4B-99E3-8C749F1FE4EA',
@@ skipping 947 matching lines @@
         'browser/history/thumbnail_database.h',
         'browser/history/top_sites.cc',
         'browser/history/url_database.cc',
         'browser/history/url_database.h',
         'browser/history/visit_database.cc',
         'browser/history/visit_database.h',
         'browser/history/visit_tracker.cc',
         'browser/history/visit_tracker.h',
         'browser/history/visitsegment_database.cc',
         'browser/history/visitsegment_database.h',
+        'browser/host_zoom_map.cc',
+        'browser/host_zoom_map.h',
         'browser/hung_renderer_dialog.h',
         'browser/icon_loader.h',
         'browser/icon_loader.cc',
         'browser/icon_loader_linux.cc',
         'browser/icon_loader_mac.mm',
         'browser/icon_loader_win.cc',
         'browser/icon_manager.cc',
         'browser/icon_manager.h',
         'browser/icon_manager_linux.cc',
         'browser/icon_manager_mac.mm',
@@ skipping 1384 matching lines @@
       ],
     },
   ],
 }
 
 # Local Variables:
 # tab-width:2
 # indent-tabs-mode:nil
 # End:
 # vim: set expandtab tabstop=2 shiftwidth=2: