Add a DistilledContentStore (and an in-memory impl)

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 36 matching lines @@
           'export_dependent_settings': [
             'distilled_page_proto',
           ],
           'sources': [
             'dom_distiller/android/component_jni_registrar.cc',
             'dom_distiller/android/component_jni_registrar.h',
             '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/distilled_content_store.cc',
+            'dom_distiller/core/distilled_content_store.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',
             'dom_distiller/core/dom_distiller_database.cc',
             'dom_distiller/core/dom_distiller_database.h',
@@ skipping 106 matching lines @@
                 'jni_gen_package': 'dom_distiller_core',
               },
               'includes': [ '../build/jni_generator.gypi' ],
             },
           ],
         }],
       ],
     }],
   ],
 }