Adds unit tests for Offliner SavePage implementation.

components/offline_pages.gypi

 # Copyright 2015 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': [
     {
       # GN: //components/offline_pages:offline_pages
       'target_name': 'offline_pages',
       'type': 'static_library',
@@ skipping 67 matching lines @@
       # GN version: //components/offline_pages:test_support
       'target_name': 'offline_pages_test_support',
       'type': 'static_library',
       'dependencies': [
         '../base/base.gyp:base',
         '../testing/gtest.gyp:gtest',
         '../url/url.gyp:url_lib',
         'offline_pages',
       ],
       'sources': [
+        'offline_pages/offline_page_test_archiver.cc',
         'offline_pages/offline_page_test_archiver.h',
-        'offline_pages/offline_page_test_archiver.cc',
+        'offline_pages/offline_page_test_store.cc',
         'offline_pages/offline_page_test_store.h',
-        'offline_pages/offline_page_test_store.cc',
+        'offline_pages/stub_offline_page_model.cc',
+        'offline_pages/stub_offline_page_model.h',
       ],
     },
   ],
   'conditions': [
     ['OS == "android"', {
       'targets': [
         {
           # GN: //components/offline_pages:offline_page_model_enums_java
           'target_name': 'offline_page_model_enums_java',
           'type': 'none',
           'variables': {
             'source_file': 'offline_pages/offline_page_types.h',
           },
           'includes': [ '../build/android/java_cpp_enum.gypi' ],
         },
       ],
     }],
   ],
 }