Add Core methods for wait set.

mojo/edk/system/wait_set_dispatcher.h

 // 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.
 
 #ifndef MOJO_EDK_SYSTEM_WAIT_SET_DISPATCHER_H_
 #define MOJO_EDK_SYSTEM_WAIT_SET_DISPATCHER_H_
 
 #include <map>
 #include <memory>
 
@@ skipping 90 matching lines @@
   };
 
   WaitSetDispatcher();
   ~WaitSetDispatcher() override;
 
   // |Dispatcher| protected methods:
   void CloseImplNoLock() override;
   util::RefPtr<Dispatcher> CreateEquivalentDispatcherAndCloseImplNoLock(
       MessagePipe* message_pipe,
       unsigned port) override;
-  MojoResult WaitSetAddImpl(UserPointer<const MojoWaitSetAddOptions> options,
-                            util::RefPtr<Dispatcher>&& dispatcher,
-                            MojoHandleSignals signals,
-                            uint64_t cookie) override;
+  MojoResult WaitSetAddImpl(
+      util::RefPtr<Dispatcher>&& dispatcher,
+      MojoHandleSignals signals,
+      uint64_t cookie,
+      UserPointer<const MojoWaitSetAddOptions> options) override;
   MojoResult WaitSetRemoveImpl(uint64_t cookie) override;
   MojoResult WaitSetWaitImpl(MojoDeadline deadline,
                              UserPointer<uint32_t> num_results,
                              UserPointer<MojoWaitSetResult> results,
                              UserPointer<uint32_t> max_results) override;
 
   // |Awakable| implementation:
   void Awake(uint64_t context,
              AwakeReason reason,
              const HandleSignalsState& signals_state) override;
@@ skipping 16 matching lines @@
   // Size of the above list.
   size_t triggered_count_ MOJO_GUARDED_BY(mutex()) = 0u;
 
   MOJO_DISALLOW_COPY_AND_ASSIGN(WaitSetDispatcher);
 };
 
 }  // namespace system
 }  // namespace mojo
 
 #endif  // MOJO_EDK_SYSTEM_WAIT_SET_DISPATCHER_H_