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

mojo/public/c/system/wait.h

Index: mojo/public/c/system/wait.h
diff --git a/mojo/public/c/system/functions.h b/mojo/public/c/system/wait.h
similarity index 73%
copy from mojo/public/c/system/functions.h
copy to mojo/public/c/system/wait.h
index 3482c5d1618238bb21213c73218fe0d99bbbe462..4ac513bfda4deebbedc8e98721066d97d7797f63 100644
--- a/mojo/public/c/system/functions.h
+++ b/mojo/public/c/system/wait.h
@@ -1,4 +1,4 @@
-// Copyright 2014 The Chromium Authors. All rights reserved.
+// Copyright 2016 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.
 
@@ -6,44 +6,17 @@
 //
 // Note: This header should be compilable as C.
 
-#ifndef MOJO_PUBLIC_C_SYSTEM_FUNCTIONS_H_
-#define MOJO_PUBLIC_C_SYSTEM_FUNCTIONS_H_
+#ifndef MOJO_PUBLIC_C_SYSTEM_WAIT_H_
+#define MOJO_PUBLIC_C_SYSTEM_WAIT_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"
 
 #ifdef __cplusplus
 extern "C" {
 #endif
 
-// Note: Pointer parameters that are labelled "optional" may be null (at least
-// under some circumstances). Non-const pointer parameters are also labeled
-// "in", "out", or "in/out", to indicate how they are used. (Note that how/if
-// such a parameter is used may depend on other parameters or the requested
-// operation's success/failure. E.g., a separate |flags| parameter may control
-// whether a given "in/out" parameter is used for input, output, or both.)
-
-// Returns the time, in microseconds, since some undefined point in the past.
-// The values are only meaningful relative to other values that were obtained
-// from the same device without an intervening system restart. Such values are
-// guaranteed to be monotonically non-decreasing with the passage of real time.
-// Although the units are microseconds, the resolution of the clock may vary and
-// is typically in the range of ~1-15 ms.
-MojoTimeTicks MojoGetTimeTicksNow(void);
-
-// Closes the given |handle|.
-//
-// Returns:
-//   |MOJO_RESULT_OK| on success.
-//   |MOJO_RESULT_INVALID_ARGUMENT| if |handle| is not a valid handle.
-//
-// Concurrent operations on |handle| may succeed (or fail as usual) if they
-// happen before the close, be cancelled with result |MOJO_RESULT_CANCELLED| if
-// they properly overlap (this is likely the case with |MojoWait()|, etc.), or
-// fail with |MOJO_RESULT_INVALID_ARGUMENT| if they happen after.
-MojoResult MojoClose(MojoHandle handle);
-
 // Waits on the given handle until one of the following happens:
 //   - A signal indicated by |signals| is satisfied.
 //   - It becomes known that no signal indicated by |signals| will ever be
@@ -132,4 +105,4 @@ MojoResult MojoWaitMany(
 }  // extern "C"
 #endif
 
-#endif  // MOJO_PUBLIC_C_SYSTEM_FUNCTIONS_H_
+#endif  // MOJO_PUBLIC_C_SYSTEM_WAIT_H_