Remove postMessage, MessageChannel and MessagePort.

sky/engine/core/core.gni

Index: sky/engine/core/core.gni
diff --git a/sky/engine/core/core.gni b/sky/engine/core/core.gni
index 57702c326de25cc6d9dba1e29114923ab76a5cee..1f395065aa92927c15f4ebfff4314e73567b003d 100644
--- a/sky/engine/core/core.gni
+++ b/sky/engine/core/core.gni
@@ -415,9 +415,6 @@ sky_core_files = [
   "dom/ExecutionContext.h",
   "dom/IncrementLoadEventDelayCount.cpp",
   "dom/IncrementLoadEventDelayCount.h",
-  "dom/MessageChannel.cpp",
-  "dom/MessageChannel.h",
-  "dom/MessagePort.cpp",
   "dom/Microtask.cpp",
   "dom/Microtask.h",
   "dom/MutationCallback.h",
@@ -651,8 +648,6 @@ sky_core_files = [
   "events/GestureEvent.h",
   "events/HashChangeEvent.h",
   "events/KeyboardEvent.cpp",
-  "events/MessageEvent.cpp",
-  "events/MessageEvent.h",
   "events/MouseEvent.cpp",
   "events/MouseRelatedEvent.cpp",
   "events/NodeEventContext.cpp",
@@ -1280,8 +1275,6 @@ core_idl_files = get_path_info([
   "dom/Document.idl",
   "dom/DocumentFragment.idl",
   "dom/Element.idl",
-  "dom/MessageChannel.idl",
-  "dom/MessagePort.idl",
   "dom/MutationObserver.idl",
   "dom/MutationRecord.idl",
   "dom/NamedNodeMap.idl",
@@ -1305,7 +1298,6 @@ core_idl_files = get_path_info([
   "events/FocusEvent.idl",
   "events/HashChangeEvent.idl",
   "events/KeyboardEvent.idl",
-  "events/MessageEvent.idl",
   "events/MouseEvent.idl",
   "events/OverflowEvent.idl",
   "events/PageTransitionEvent.idl",
@@ -1427,7 +1419,6 @@ core_event_idl_files = get_path_info([
   "events/FocusEvent.idl",
   "events/HashChangeEvent.idl",
   "events/KeyboardEvent.idl",
-  "events/MessageEvent.idl",
   "events/MouseEvent.idl",
   "events/OverflowEvent.idl",
   "events/PageTransitionEvent.idl",