Mojo: Wrap the satisfied/unsatisfied wait flags state in a single object.

mojo/system/local_message_pipe_endpoint.h

 // Copyright 2013 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_SYSTEM_LOCAL_MESSAGE_PIPE_ENDPOINT_H_
 #define MOJO_SYSTEM_LOCAL_MESSAGE_PIPE_ENDPOINT_H_
 
 #include "base/compiler_specific.h"
 #include "base/macros.h"
 #include "mojo/system/message_in_transit_queue.h"
 #include "mojo/system/message_pipe_endpoint.h"
 #include "mojo/system/system_impl_export.h"
+#include "mojo/system/wait_flags_state.h"
 #include "mojo/system/waiter_list.h"
 
 namespace mojo {
 namespace system {
 
 class MOJO_SYSTEM_IMPL_EXPORT LocalMessagePipeEndpoint
     : public MessagePipeEndpoint {
  public:
   LocalMessagePipeEndpoint();
   virtual ~LocalMessagePipeEndpoint();
@@ skipping 14 matching lines @@
                                  MojoReadMessageFlags flags) OVERRIDE;
   virtual MojoResult AddWaiter(Waiter* waiter,
                                MojoWaitFlags flags,
                                MojoResult wake_result) OVERRIDE;
   virtual void RemoveWaiter(Waiter* waiter) OVERRIDE;
 
   // This is only to be used by |ProxyMessagePipeEndpoint|:
   MessageInTransitQueue* message_queue() { return &message_queue_; }
 
  private:
-  MojoWaitFlags SatisfiedFlags();
-  MojoWaitFlags SatisfiableFlags();
+  WaitFlagsState GetWaitFlagsState();
 
   bool is_open_;
   bool is_peer_open_;
 
   // Queue of incoming messages.
   MessageInTransitQueue message_queue_;
   WaiterList waiter_list_;
 
   DISALLOW_COPY_AND_ASSIGN(LocalMessagePipeEndpoint);
 };
 
 }  // namespace system
 }  // namespace mojo
 
 #endif  // MOJO_SYSTEM_LOCAL_MESSAGE_PIPE_ENDPOINT_H_