[DO NOT REVIEW][DO NOT COMMIT] Implement WebDataProducerHandleImpl.

content/content_child.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.
 
 {
   'dependencies': [
     '../base/base.gyp:base',
     '../components/tracing.gyp:tracing',
     '../mojo/mojo_base.gyp:mojo_environment_chromium',
     '../mojo/mojo_base.gyp:mojo_common_lib',
@@ skipping 202 matching lines @@
       'child/site_isolation_policy.cc',
       'child/site_isolation_policy.h',
       'child/sync_load_response.cc',
       'child/sync_load_response.h',
       'child/thread_safe_sender.cc',
       'child/thread_safe_sender.h',
       'child/threaded_data_provider.cc',
       'child/threaded_data_provider.h',
       'child/web_data_consumer_handle_impl.cc',
       'child/web_data_consumer_handle_impl.h',
+      'child/web_data_producer_handle_impl.cc',
+      'child/web_data_producer_handle_impl.h',
       'child/web_database_observer_impl.cc',
       'child/web_database_observer_impl.h',
       'child/web_discardable_memory_impl.cc',
       'child/web_discardable_memory_impl.h',
       'child/web_gesture_curve_impl.cc',
       'child/web_gesture_curve_impl.h',
       'child/web_url_loader_impl.cc',
       'child/web_url_loader_impl.h',
       'child/web_url_request_util.cc',
       'child/web_url_request_util.h',
@@ skipping 161 matching lines @@
         }, {
           'dependencies': [
             '../third_party/nss/nss.gyp:nspr',
             '../third_party/nss/nss.gyp:nss',
           ],
         }],
       ],
     }],
   ],
 }