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

mojo/system/platform_handle_dispatcher.h

Index: mojo/system/platform_handle_dispatcher.h
diff --git a/mojo/system/platform_handle_dispatcher.h b/mojo/system/platform_handle_dispatcher.h
index 2bf4d1923999f9a086a1b58cc17376fea7a63b34..2e610987793215f55fd94e743f107ea7fe4acffd 100644
--- a/mojo/system/platform_handle_dispatcher.h
+++ b/mojo/system/platform_handle_dispatcher.h
@@ -50,9 +50,8 @@ class MOJO_SYSTEM_IMPL_EXPORT PlatformHandleDispatcher
       size_t* actual_size,
       embedder::PlatformHandleVector* platform_handles) OVERRIDE;
 
-  // |SimpleDispatcher| methods:
-  virtual MojoWaitFlags SatisfiedFlagsNoLock() const OVERRIDE;
-  virtual MojoWaitFlags SatisfiableFlagsNoLock() const OVERRIDE;
+  // |SimpleDispatcher| method:
+  virtual WaitFlagsState GetWaitFlagsStateNoLock() const OVERRIDE;
 
   embedder::ScopedPlatformHandle platform_handle_;