Implement InlinedVector independently of absl.
diff --git a/grpc.gemspec b/grpc.gemspec
index d185995..95836a5 100644
--- a/grpc.gemspec
+++ b/grpc.gemspec
@@ -349,6 +349,7 @@
s.files += %w( src/core/lib/support/debug_location.h )
s.files += %w( src/core/lib/support/ref_counted.h )
s.files += %w( src/core/lib/support/ref_counted_ptr.h )
+ s.files += %w( src/core/lib/support/vector.h )
s.files += %w( src/core/lib/surface/alarm_internal.h )
s.files += %w( src/core/lib/surface/api_trace.h )
s.files += %w( src/core/lib/surface/call.h )