Get rid of base::SharedMemory::NULLHandle();

mojo/edk/embedder/embedder.h

Index: mojo/edk/embedder/embedder.h
diff --git a/mojo/edk/embedder/embedder.h b/mojo/edk/embedder/embedder.h
index 97258e52f61d535bcf96f95be25ecf659fbefb56..e3122c68e5a5fb15c1812b196d554b2f2213ac13 100644
--- a/mojo/edk/embedder/embedder.h
+++ b/mojo/edk/embedder/embedder.h
@@ -109,8 +109,8 @@ CreateSharedBufferWrapper(base::SharedMemoryHandle shared_memory_handle,
 // |MojoHandle| and closes the handle. If successful, |num_bytes| will contain
 // the size of the shared memory buffer and |read_only| will contain whether the
 // buffer handle is read-only. Both |num_bytes| and |read_only| may be null.
-// Note: The value of |shared_memory_handle| may be
-// base::SharedMemory::NULLHandle(), even if this function returns success.
+// Note: |shared_memory_handle| may be invalid even if this function returns
+// success.
 // Callers should perform appropriate checks.
 MOJO_SYSTEM_IMPL_EXPORT MojoResult
 PassSharedMemoryHandle(MojoHandle mojo_handle,