Implement webview.captureVisibleRegion()

content/content_browser.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.
 
 {
   'dependencies': [
     '../base/base.gyp:base_static',
     '../components/url_formatter/url_formatter.gyp:url_formatter',
     '../crypto/crypto.gyp:crypto',
     '../device/battery/battery.gyp:device_battery',
@@ skipping 1096 matching lines @@
       'browser/profiler_controller_impl.cc',
       'browser/profiler_controller_impl.h',
       'browser/profiler_message_filter.cc',
       'browser/profiler_message_filter.h',
       'browser/push_messaging/push_messaging_message_filter.cc',
       'browser/push_messaging/push_messaging_message_filter.h',
       'browser/push_messaging/push_messaging_router.cc',
       'browser/push_messaging/push_messaging_router.h',
       'browser/quota_dispatcher_host.cc',
       'browser/quota_dispatcher_host.h',
+      'browser/readback_request_helpers.cc',
+      'browser/readback_request_helpers.h',
       'browser/renderer_data_memoizing_store.h',
       'browser/renderer_host/begin_frame_observer_proxy.cc',
       'browser/renderer_host/begin_frame_observer_proxy.h',
       'browser/renderer_host/clipboard_message_filter.cc',
       'browser/renderer_host/clipboard_message_filter.h',
       'browser/renderer_host/clipboard_message_filter_mac.mm',
       'browser/renderer_host/compositor_resize_lock_aura.cc',
       'browser/renderer_host/compositor_resize_lock_aura.h',
       'browser/renderer_host/database_message_filter.cc',
       'browser/renderer_host/database_message_filter.h',
@@ skipping 1087 matching lines @@
     ['enable_webvr==1 and OS=="android"', {
       'sources': [
         'browser/vr/android/cardboard/cardboard_vr_device.cc',
         'browser/vr/android/cardboard/cardboard_vr_device.h',
         'browser/vr/android/cardboard/cardboard_vr_device_provider.cc',
         'browser/vr/android/cardboard/cardboard_vr_device_provider.h',
       ],
     }],
   ],
 }