Add mojo/c/system/{time.h,wait.h}.

mojo/public/c/environment/async_waiter.h

 // 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.
 
 #ifndef MOJO_PUBLIC_C_ENVIRONMENT_ASYNC_WAITER_H_
 #define MOJO_PUBLIC_C_ENVIRONMENT_ASYNC_WAITER_H_
 
 #include "mojo/public/c/system/handle.h"
 #include "mojo/public/c/system/result.h"
-#include "mojo/public/c/system/types.h"
+#include "mojo/public/c/system/time.h"
 
 typedef uintptr_t MojoAsyncWaitID;
 
 typedef void (*MojoAsyncWaitCallback)(void* closure, MojoResult result);
 
 // Functions for asynchronously waiting (and cancelling asynchronous waits) on a
 // handle.
 //
 // Thread-safety:
 //   - |CancelWait(wait_id)| may only be called on the same thread as the
@@ skipping 37 matching lines @@
   //
   // Once this has been called, the callback provided to |AsyncWait()| will not
   // be called. Moreover, it is then immediately safe to close or transfer the
   // handle provided to |AsyncWait()|. (I.e., the implementation of this
   // |MojoAsyncWaiter| will no longer wait on, or do anything else with, the
   // handle.)
   void (*CancelWait)(MojoAsyncWaitID wait_id);
 };
 
 #endif  // MOJO_PUBLIC_C_ENVIRONMENT_ASYNC_WAITER_H_