Add support for distilling current WebContents

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 137 matching lines @@
                 'dom_distiller_core',
               ],
               'include_dirs': [
                 '..',
               ],
               'sources': [
                 'dom_distiller/content/distiller_page_web_contents.cc',
                 'dom_distiller/content/distiller_page_web_contents.h',
                 'dom_distiller/content/dom_distiller_viewer_source.cc',
                 'dom_distiller/content/dom_distiller_viewer_source.h',
+                'dom_distiller/content/web_contents_main_frame_observer.cc',
+                'dom_distiller/content/web_contents_main_frame_observer.h',
               ],
             },
           ],
         }],
         ['OS=="android"', {
           'targets': [
             {
               'target_name': 'dom_distiller_core_java',
               'type': 'none',
               'dependencies': [
@@ skipping 14 matching lines @@
                 'jni_gen_package': 'dom_distiller_core',
               },
               'includes': [ '../build/jni_generator.gypi' ],
             },
           ],
         }],
       ],
     }],
   ],
 }