Allow extension APIs to be compiled out.

chrome/chrome_dll.gypi

 # 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.
 {
   'conditions': [
     ['OS=="mac" or OS=="win"', {
       'targets': [
         {
           'target_name': 'chrome_dll',
           'type': 'none',
@@ skipping 79 matching lines @@
                 '../webkit/glue/resources/zoom_in.cur',
                 '../webkit/glue/resources/zoom_out.cur',
 
                 # TODO:  It would be nice to have these pulled in
                 # automatically from direct_dependent_settings in
                 # their various targets (net.gyp:net_resources, etc.),
                 # but that causes errors in other targets when
                 # resulting .res files get referenced multiple times.
                 '<(SHARED_INTERMEDIATE_DIR)/chrome/browser_resources.rc',
                 '<(SHARED_INTERMEDIATE_DIR)/chrome/common_resources.rc',
+                '<(SHARED_INTERMEDIATE_DIR)/chrome/extensions_api_resources.rc',
                 '<(SHARED_INTERMEDIATE_DIR)/chrome/renderer_resources.rc',
                 '<(SHARED_INTERMEDIATE_DIR)/chrome/theme_resources.rc',
                 '<(SHARED_INTERMEDIATE_DIR)/chrome/theme_resources_standard.rc',
                 '<(SHARED_INTERMEDIATE_DIR)/content/content_resources.rc',
                 '<(SHARED_INTERMEDIATE_DIR)/net/net_resources.rc',
                 '<(SHARED_INTERMEDIATE_DIR)/ui/gfx/gfx_resources.rc',
                 '<(SHARED_INTERMEDIATE_DIR)/ui/ui_resources/ui_resources.rc',
                 '<(SHARED_INTERMEDIATE_DIR)/ui/ui_resources_standard/ui_resources_standard.rc',
                 '<(SHARED_INTERMEDIATE_DIR)/webkit/webkit_chromium_resources.rc',
                 '<(SHARED_INTERMEDIATE_DIR)/webkit/webkit_resources.rc',
@@ skipping 427 matching lines @@
                   ],
                 }],
               ],  # conditions
             }],  # OS=="mac"
           ],  # conditions
         },  # target chrome_dll
       ],  # targets
     }],  # OS=="mac" or OS=="win"
   ],
 }