reland crrev.com/212927 Move webkitplatformsupport_impl and related from glue to child

content/content_child.gypi

Index: content/content_child.gypi
diff --git a/content/content_child.gypi b/content/content_child.gypi
index 7f78971164e8161e5839d8e5fc255733664a546e..ffca557f39bebfd94970137d2e7c59952ef4a6a8 100644
--- a/content/content_child.gypi
+++ b/content/content_child.gypi
@@ -16,7 +16,6 @@
     '../base/base.gyp:base',
   ],
   'sources': [
-    'public/child/image_decoder_utils.h',
     'child/android/child_jni_registrar.cc',
     'child/android/child_jni_registrar.h',
     'child/appcache_backend_proxy.cc',
@@ -47,10 +46,10 @@
     'child/image_decoder.h',
     'child/indexed_db/indexed_db_dispatcher.cc',
     'child/indexed_db/indexed_db_dispatcher.h',
-    'child/indexed_db/indexed_db_message_filter.cc',
-    'child/indexed_db/indexed_db_message_filter.h',
     'child/indexed_db/indexed_db_key_builders.cc',
     'child/indexed_db/indexed_db_key_builders.h',
+    'child/indexed_db/indexed_db_message_filter.cc',
+    'child/indexed_db/indexed_db_message_filter.h',
     'child/indexed_db/proxy_webidbcursor_impl.cc',
     'child/indexed_db/proxy_webidbcursor_impl.h',
     'child/indexed_db/proxy_webidbdatabase_impl.cc',
@@ -62,12 +61,12 @@
     'child/npapi/npobject_base.h',
     'child/npapi/npobject_proxy.cc',
     'child/npapi/npobject_proxy.h',
-    'child/npapi/npruntime_util.cc',
-    'child/npapi/npruntime_util.h',
     'child/npapi/npobject_stub.cc',
     'child/npapi/npobject_stub.h',
     'child/npapi/npobject_util.cc',
     'child/npapi/npobject_util.h',
+    'child/npapi/npruntime_util.cc',
+    'child/npapi/npruntime_util.h',
     'child/npapi/plugin_host.cc',
     'child/npapi/plugin_host.h',
     'child/npapi/plugin_instance.cc',
@@ -114,14 +113,16 @@
     'child/socket_stream_dispatcher.h',
     'child/thread_safe_sender.cc',
     'child/thread_safe_sender.h',
-    'child/webblobregistry_impl.cc',
-    'child/webblobregistry_impl.h',
     'child/web_database_observer_impl.cc',
     'child/web_database_observer_impl.h',
+    'child/webblobregistry_impl.cc',
+    'child/webblobregistry_impl.h',
     'child/webkitplatformsupport_impl.cc',
     'child/webkitplatformsupport_impl.h',
     'child/webmessageportchannel_impl.cc',
     'child/webmessageportchannel_impl.h',
+    'public/child/image_decoder_utils.h',
+    'public/child/resource_dispatcher_delegate.h',
   ],
   'conditions': [
     ['OS=="android"', {