[heap] GCTracer: Account for sweeping during incremental marking

src/heap/gc-tracer.h

 // Copyright 2014 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_HEAP_GC_TRACER_H_
 #define V8_HEAP_GC_TRACER_H_
 
 #include "src/base/compiler-specific.h"
 #include "src/base/platform/platform.h"
 #include "src/counters.h"
@@ skipping 45 matching lines @@
 
 inline BytesAndDuration MakeBytesAndDuration(uint64_t bytes, double duration) {
   return std::make_pair(bytes, duration);
 }
 
 enum ScavengeSpeedMode { kForAllObjects, kForSurvivedObjects };
 
 #define INCREMENTAL_SCOPES(F)                                      \
   /* MC_INCREMENTAL is the top-level incremental marking scope. */ \
   F(MC_INCREMENTAL)                                                \
+  F(MC_INCREMENTAL_SWEEPING)                                       \
   F(MC_INCREMENTAL_WRAPPER_PROLOGUE)                               \
   F(MC_INCREMENTAL_WRAPPER_TRACING)                                \
   F(MC_INCREMENTAL_FINALIZE)                                       \
   F(MC_INCREMENTAL_FINALIZE_BODY)                                  \
   F(MC_INCREMENTAL_FINALIZE_OBJECT_GROUPING)                       \
   F(MC_INCREMENTAL_EXTERNAL_EPILOGUE)                              \
   F(MC_INCREMENTAL_EXTERNAL_PROLOGUE)
 
 #define TRACER_SCOPES(F)                      \
   INCREMENTAL_SCOPES(F)                       \
@@ skipping 428 matching lines @@
   RingBuffer<BytesAndDuration> recorded_old_generation_allocations_;
   RingBuffer<double> recorded_context_disposal_times_;
   RingBuffer<double> recorded_survival_ratios_;
 
   DISALLOW_COPY_AND_ASSIGN(GCTracer);
 };
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_HEAP_GC_TRACER_H_