[heap] GCTracer: Account for sweeping during incremental marking

src/heap/gc-tracer.cc

Index: src/heap/gc-tracer.cc
diff --git a/src/heap/gc-tracer.cc b/src/heap/gc-tracer.cc
index 695a259884804b2bcea347e164b43ec1f3517a48..e080b213c338128cd1a9e06956f80076ca1ce4c1 100644
--- a/src/heap/gc-tracer.cc
+++ b/src/heap/gc-tracer.cc
@@ -580,6 +580,7 @@ void GCTracer::PrintNVP() const {
           "incremental.finalize.external.prologue=%.1f "
           "incremental.finalize.external.epilogue=%.1f "
           "incremental.finalize.object_grouping=%.1f "
+          "incremental.sweeping=%.1f "
           "incremental.wrapper_prologue=%.1f "
           "incremental.wrapper_tracing=%.1f "
           "incremental_wrapper_tracing_longest_step=%.1f "
@@ -659,6 +660,7 @@ void GCTracer::PrintNVP() const {
           current_.scopes[Scope::MC_INCREMENTAL_EXTERNAL_PROLOGUE],
           current_.scopes[Scope::MC_INCREMENTAL_EXTERNAL_EPILOGUE],
           current_.scopes[Scope::MC_INCREMENTAL_FINALIZE_OBJECT_GROUPING],
+          current_.scopes[Scope::MC_INCREMENTAL_SWEEPING],
           current_.scopes[Scope::MC_INCREMENTAL_WRAPPER_PROLOGUE],
           current_.scopes[Scope::MC_INCREMENTAL_WRAPPER_TRACING],
           current_