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

mojo/system/shared_buffer_dispatcher.cc

Index: mojo/system/shared_buffer_dispatcher.cc
diff --git a/mojo/system/shared_buffer_dispatcher.cc b/mojo/system/shared_buffer_dispatcher.cc
index 57f0b6e7482135b49082937882d8085b988ad099..4400b8ab22a6c61d666c8a65c914716297acc4a4 100644
--- a/mojo/system/shared_buffer_dispatcher.cc
+++ b/mojo/system/shared_buffer_dispatcher.cc
@@ -263,14 +263,9 @@ bool SharedBufferDispatcher::EndSerializeAndCloseImplNoLock(
   return true;
 }
 
-MojoWaitFlags SharedBufferDispatcher::SatisfiedFlagsNoLock() const {
+WaitFlagsState SharedBufferDispatcher::GetWaitFlagsStateNoLock() const {
   // TODO(vtl): Add transferrable flag.
-  return MOJO_WAIT_FLAG_NONE;
-}
-
-MojoWaitFlags SharedBufferDispatcher::SatisfiableFlagsNoLock() const {
-  // TODO(vtl): Add transferrable flag.
-  return MOJO_WAIT_FLAG_NONE;
+  return WaitFlagsState();
 }
 
 }  // namespace system