Remove support for "all or none" two-phase data pipe read/write.

mojo/public/go/bindings/invalid_handle.go

 // 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.
 
 package bindings
 
 import (
         "mojo/public/go/system"
 )
 
@@ skipping 38 matching lines @@
 }
 
 func (h *InvalidHandle) ToSharedBufferHandle() system.SharedBufferHandle {
         return h
 }
 
 func (h *InvalidHandle) ReadData(flags system.MojoReadDataFlags) (system.MojoResult, []byte) {
         return system.MOJO_RESULT_INVALID_ARGUMENT, nil
 }
 
-func (h *InvalidHandle) BeginReadData(numBytes int, flags system.MojoReadDataFlags) (system.MojoResult, []byte) {
+func (h *InvalidHandle) BeginReadData(flags system.MojoReadDataFlags) (system.MojoResult, []byte) {
         return system.MOJO_RESULT_INVALID_ARGUMENT, nil
 }
 
 func (h *InvalidHandle) EndReadData(numBytesRead int) system.MojoResult {
         return system.MOJO_RESULT_INVALID_ARGUMENT
 }
 
 func (h *InvalidHandle) WriteData(data []byte, flags system.MojoWriteDataFlags) (system.MojoResult, int) {
         return system.MOJO_RESULT_INVALID_ARGUMENT, 0
 }
 
-func (h *InvalidHandle) BeginWriteData(numBytes int, flags system.MojoWriteDataFlags) (system.MojoResult, []byte) {
+func (h *InvalidHandle) BeginWriteData(flags system.MojoWriteDataFlags) (system.MojoResult, []byte) {
         return system.MOJO_RESULT_INVALID_ARGUMENT, nil
 }
 
 func (h *InvalidHandle) EndWriteData(numBytesWritten int) system.MojoResult {
         return system.MOJO_RESULT_INVALID_ARGUMENT
 }
 
 func (h *InvalidHandle) ReadMessage(flags system.MojoReadMessageFlags) (system.MojoResult, []byte, []system.UntypedHandle) {
         return system.MOJO_RESULT_INVALID_ARGUMENT, nil, nil
 }
 
 func (h *InvalidHandle) WriteMessage(bytes []byte, handles []system.UntypedHandle, flags system.MojoWriteMessageFlags) system.MojoResult {
         return system.MOJO_RESULT_INVALID_ARGUMENT
 }
 
 func (h *InvalidHandle) DuplicateBufferHandle(opts *system.DuplicateBufferHandleOptions) (system.MojoResult, system.SharedBufferHandle) {
         return system.MOJO_RESULT_INVALID_ARGUMENT, nil
 }
 
 func (h *InvalidHandle) MapBuffer(offset uint64, numBytes int, flags system.MojoMapBufferFlags) (system.MojoResult, []byte) {
         return system.MOJO_RESULT_INVALID_ARGUMENT, nil
 }
 
 func (h *InvalidHandle) UnmapBuffer(buffer []byte) system.MojoResult {
         return system.MOJO_RESULT_INVALID_ARGUMENT
 }