C++ize BDP estimator, introduce ManualConstructor
diff --git a/Makefile b/Makefile
index 382956d..4091aa3 100644
--- a/Makefile
+++ b/Makefile
@@ -3606,7 +3606,7 @@
     test/core/end2end/fixtures/http_proxy_fixture.c \
     test/core/end2end/fixtures/proxy.c \
     test/core/iomgr/endpoint_tests.c \
-    test/core/util/debugger_macros.c \
+    test/core/util/debugger_macros.cc \
     test/core/util/grpc_profiler.c \
     test/core/util/memory_counters.c \
     test/core/util/mock_endpoint.c \
@@ -3861,7 +3861,7 @@
     test/core/end2end/fixtures/http_proxy_fixture.c \
     test/core/end2end/fixtures/proxy.c \
     test/core/iomgr/endpoint_tests.c \
-    test/core/util/debugger_macros.c \
+    test/core/util/debugger_macros.cc \
     test/core/util/grpc_profiler.c \
     test/core/util/memory_counters.c \
     test/core/util/mock_endpoint.c \