Rationalize Dart mojo and sky package structure

mojo/public/dart/src/natives.dart

-// Copyright 2015 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.
-
-part of internal;
-
-class MojoHandleNatives {
-  static int register(
-      Object eventStream, int handle) native "MojoHandle_Register";
-  static int close(int handle) native "MojoHandle_Close";
-  static List wait(
-      int handle, int signals, int deadline) native "MojoHandle_Wait";
-  static List waitMany(List<int> handles, List<int> signals,
-      int deadline) native "MojoHandle_WaitMany";
-}
-
-class MojoHandleWatcherNatives {
-  static int sendControlData(int controlHandle, int mojoHandle, SendPort port,
-      int data) native "MojoHandleWatcher_SendControlData";
-  static List recvControlData(
-      int controlHandle) native "MojoHandleWatcher_RecvControlData";
-  static int setControlHandle(
-      int controlHandle) native "MojoHandleWatcher_SetControlHandle";
-  static int getControlHandle() native "MojoHandleWatcher_GetControlHandle";
-}
-
-class MojoMessagePipeNatives {
-  static List MojoCreateMessagePipe(int flags) native "MojoMessagePipe_Create";
-
-  static int MojoWriteMessage(int handle, ByteData data, int numBytes,
-      List<int> handles, int flags) native "MojoMessagePipe_Write";
-
-  static List MojoReadMessage(int handle, ByteData data, int numBytes,
-      List<int> handles, int flags) native "MojoMessagePipe_Read";
-}
-
-class MojoDataPipeNatives {
-  static List MojoCreateDataPipe(int elementBytes, int capacityBytes,
-      int flags) native "MojoDataPipe_Create";
-
-  static List MojoWriteData(int handle, ByteData data, int numBytes,
-      int flags) native "MojoDataPipe_WriteData";
-
-  static List MojoBeginWriteData(int handle, int bufferBytes,
-      int flags) native "MojoDataPipe_BeginWriteData";
-
-  static int MojoEndWriteData(
-      int handle, int bytesWritten) native "MojoDataPipe_EndWriteData";
-
-  static List MojoReadData(int handle, ByteData data, int numBytes,
-      int flags) native "MojoDataPipe_ReadData";
-
-  static List MojoBeginReadData(int handle, int bufferBytes,
-      int flags) native "MojoDataPipe_BeginReadData";
-
-  static int MojoEndReadData(
-      int handle, int bytesRead) native "MojoDataPipe_EndReadData";
-}
-
-class MojoSharedBufferNatives {
-  static List Create(int numBytes, int flags) native "MojoSharedBuffer_Create";
-
-  static List Duplicate(
-      int bufferHandle, int flags) native "MojoSharedBuffer_Duplicate";
-
-  static List Map(Object buffer, int bufferHandle, int offset, int numBytes,
-      int flags) native "MojoSharedBuffer_Map";
-
-  static int Unmap(ByteData buffer) native "MojoSharedBuffer_Unmap";
-}