Revert "Update mojo sdk to rev 8d45c89c30b230843c5bd6dd0693a555750946c0"

third_party/mojo/src/mojo/public/c/system/functions.h

Index: third_party/mojo/src/mojo/public/c/system/functions.h
diff --git a/third_party/mojo/src/mojo/public/c/system/functions.h b/third_party/mojo/src/mojo/public/c/system/functions.h
index c53a4ed0039dd642d8620508b616eb37bacfc9cb..5e0a0c414df9dfd88afabb91e18c3ce75f86b11d 100644
--- a/third_party/mojo/src/mojo/public/c/system/functions.h
+++ b/third_party/mojo/src/mojo/public/c/system/functions.h
@@ -9,6 +9,8 @@
 #ifndef MOJO_PUBLIC_C_SYSTEM_FUNCTIONS_H_
 #define MOJO_PUBLIC_C_SYSTEM_FUNCTIONS_H_
 
+// Note: This header should be compilable as C.
+
 #include "mojo/public/c/system/system_export.h"
 #include "mojo/public/c/system/types.h"
 
@@ -23,12 +25,9 @@ extern "C" {
 // 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-increasing 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.
+// Platform-dependent monotonically increasing tick count representing "right
+// now." The resolution of this clock is ~1-15ms. Resolution varies depending
+// on hardware/operating system configuration.
 MOJO_SYSTEM_EXPORT MojoTimeTicks MojoGetTimeTicksNow(void);
 
 // Closes the given |handle|.
@@ -72,7 +71,7 @@ MOJO_SYSTEM_EXPORT MojoResult MojoClose(MojoHandle handle);
 //       end of a message pipe and the other end is closed).
 //
 // If there are multiple waiters (on different threads, obviously) waiting on
-// the same handle and signal, and that signal becomes satisfied, all waiters
+// the same handle and signal, and that signal becomes is satisfied, all waiters
 // will be awoken.
 MOJO_SYSTEM_EXPORT MojoResult
 MojoWait(MojoHandle handle,