NaCl: create a separate namespace for Mojo handles.

mojo/edk/system/core.h

Index: mojo/edk/system/core.h
diff --git a/mojo/edk/system/core.h b/mojo/edk/system/core.h
index aadfb661ec241d6938165e1b716cae3fe1453eec..95f9f5be1e86c654d1336f8bd8628ed2abb4bcbc 100644
--- a/mojo/edk/system/core.h
+++ b/mojo/edk/system/core.h
@@ -52,6 +52,9 @@ class MOJO_SYSTEM_IMPL_EXPORT Core {
   // invalid.
   scoped_refptr<Dispatcher> GetDispatcher(MojoHandle handle);
 
+  // Like GetDispatcher, but also removes the handle from the handle table.

[viettrungluu, 2015/04/01 23:36:19]

nit: For consistency, "GetDispatcher" -> "|GetDispatcher()|.

[Nick Bray (chromium), 2015/04/04 00:09:09]

Done.

+  scoped_refptr<Dispatcher> PopDispatcher(MojoHandle handle);

[viettrungluu, 2015/04/01 23:36:19]

For parallelism with HandleTable, call this GetAndRemoveDispatcher.

[Nick Bray (chromium), 2015/04/04 00:09:09]

Done.

+
   // Watches on the given handle for the given signals, calling |callback| when
   // a signal is satisfied or when all signals become unsatisfiable. |callback|
   // must satisfy stringent requirements -- see |Awakable::Awake()| in