Build targets from mojo_base on iOS

mojo/system/message_pipe_test_utils.cc

 // Copyright 2014 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.
 
 #include "mojo/system/message_pipe_test_utils.h"
 
 #include "base/bind.h"
 #include "base/threading/platform_thread.h"  // For |Sleep()|.
 #include "mojo/system/waiter.h"
 
@@ skipping 76 matching lines @@
   CHECK(channel_->RunMessagePipeEndpoint(Channel::kBootstrapEndpointId,
                                          Channel::kBootstrapEndpointId));
 }
 
 void ChannelThread::ShutdownChannelOnIOThread() {
   CHECK(channel_.get());
   channel_->Shutdown();
   channel_ = NULL;
 }
 
+#if !defined(OS_IOS)
 MultiprocessMessagePipeTestBase::MultiprocessMessagePipeTestBase()
     : channel_thread_(&platform_support_) {
 }
 
 MultiprocessMessagePipeTestBase::~MultiprocessMessagePipeTestBase() {
 }
 
 void MultiprocessMessagePipeTestBase::Init(scoped_refptr<MessagePipe> mp) {
   channel_thread_.Start(helper_.server_platform_handle.Pass(), mp);
 }
+#endif
 
 }  // namespace test
 }  // namespace system
 }  // namespace mojo