Move mojo::{Wait,WaitMany}() to (the newly-added) mojo/public/cpp/system/wait.h.

mojo/data_pipe_utils/data_pipe_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/data_pipe_utils/data_pipe_utils.h"
 
 #include <stdio.h>
 
 #include "base/message_loop/message_loop.h"
 #include "base/task_runner_util.h"
 #include "base/threading/platform_thread.h"
 #include "base/trace_event/trace_event.h"
 #include "mojo/data_pipe_utils/data_pipe_utils_internal.h"
+#include "mojo/public/cpp/system/wait.h"
 
 namespace mojo {
 namespace common {
 
 bool BlockingCopyHelper(
     ScopedDataPipeConsumerHandle source,
     const base::Callback<size_t(const void*, uint32_t)>& write_bytes) {
   for (;;) {
     const void* buffer = nullptr;
     uint32_t num_bytes = 0;
@@ skipping 82 matching lines @@
       }
     } else {
       // If the consumer handle was closed, then treat as EOF.
       return result == MOJO_RESULT_FAILED_PRECONDITION;
     }
   }
 }
 
 }  // namespace common
 }  // namespace mojo