Mojo EDK: Introduce MojoQueryHandleSignalsState API

mojo/edk/embedder/entrypoints.cc

Index: mojo/edk/embedder/entrypoints.cc
diff --git a/mojo/edk/embedder/entrypoints.cc b/mojo/edk/embedder/entrypoints.cc
index ecf163061f5970d5d74965d1b162debef1499ada..5c149d969f57b080a71f09e8ece6ce02a064d1dc 100644
--- a/mojo/edk/embedder/entrypoints.cc
+++ b/mojo/edk/embedder/entrypoints.cc
@@ -28,6 +28,12 @@ MojoResult MojoCloseImpl(MojoHandle handle) {
   return g_core->Close(handle);
 }
 
+MojoResult MojoQueryHandleSignalsStateImpl(
+    MojoHandle handle,
+    MojoHandleSignalsState* signals_state) {
+  return g_core->QueryHandleSignalsState(handle, signals_state);
+}
+
 MojoResult MojoWaitImpl(MojoHandle handle,
                         MojoHandleSignals signals,
                         MojoDeadline deadline,
@@ -281,6 +287,7 @@ MojoSystemThunks MakeSystemThunks() {
   MojoSystemThunks system_thunks = {sizeof(MojoSystemThunks),
                                     MojoGetTimeTicksNowImpl,
                                     MojoCloseImpl,
+                                    MojoQueryHandleSignalsStateImpl,
                                     MojoWaitImpl,
                                     MojoWaitManyImpl,
                                     MojoCreateMessagePipeImpl,