Add incremental updates for multipage distillation.

components/dom_distiller.gypi

 # 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.
 
 {
   'conditions': [
     ['android_webview_build == 0', {
       'targets': [
         {
           'target_name': 'dom_distiller_webui',
@@ skipping 30 matching lines @@
             '../third_party/protobuf/protobuf.gyp:protobuf_lite',
             '../third_party/leveldatabase/leveldatabase.gyp:leveldatabase',
           ],
           'include_dirs': [
             '..',
           ],
           'export_dependent_settings': [
             'distilled_page_proto',
           ],
           'sources': [
+            'dom_distiller/core/article_distillation_update.cc',
+            'dom_distiller/core/article_distillation_update.h',
             'dom_distiller/core/article_entry.cc',
             'dom_distiller/core/article_entry.h',
             'dom_distiller/core/distiller.cc',
             'dom_distiller/core/distiller.h',
             'dom_distiller/core/distiller_page.cc',
             'dom_distiller/core/distiller_page.h',
             'dom_distiller/core/distiller_url_fetcher.cc',
             'dom_distiller/core/distiller_url_fetcher.h',
             'dom_distiller/core/dom_distiller_constants.cc',
             'dom_distiller/core/dom_distiller_constants.h',
@@ skipping 69 matching lines @@
                 'dom_distiller/content/dom_distiller_viewer_source.cc',
                 'dom_distiller/content/dom_distiller_viewer_source.h',
               ],
             },
           ],
         }],
       ],
     }],
   ],
 }