[heap] No leakage of mark-compact.h outside of heap.

src/heap/incremental-marking.h

Index: src/heap/incremental-marking.h
diff --git a/src/heap/incremental-marking.h b/src/heap/incremental-marking.h
index e0b449a124022f767848e0aa753c6c0f8b701aa3..fb6e5cf6ab47be099da81231d24fe519c2b012de 100644
--- a/src/heap/incremental-marking.h
+++ b/src/heap/incremental-marking.h
@@ -8,12 +8,15 @@
 #include "src/cancelable-task.h"
 #include "src/execution.h"
 #include "src/heap/incremental-marking-job.h"
-#include "src/heap/mark-compact.h"
 #include "src/objects.h"
 
 namespace v8 {
 namespace internal {
 
+// Forward declarations.
+class MarkBit;
+class PagedSpace;
+
 class IncrementalMarking {
  public:
   enum State { STOPPED, SWEEPING, MARKING, COMPLETE };
@@ -172,7 +175,7 @@ class IncrementalMarking {
     SetOldSpacePageFlags(chunk, IsMarking(), IsCompacting());
   }
 
-  inline void SetNewSpacePageFlags(NewSpacePage* chunk) {
+  inline void SetNewSpacePageFlags(MemoryChunk* chunk) {
     SetNewSpacePageFlags(chunk, IsMarking());
   }
 
@@ -222,7 +225,7 @@ class IncrementalMarking {
   static void SetOldSpacePageFlags(MemoryChunk* chunk, bool is_marking,
                                    bool is_compacting);
 
-  static void SetNewSpacePageFlags(NewSpacePage* chunk, bool is_marking);
+  static void SetNewSpacePageFlags(MemoryChunk* chunk, bool is_marking);
 
   INLINE(void ProcessMarkingDeque());