[heap] Force inlining of AllocatedSinceLastGC

src/heap/heap.h

Index: src/heap/heap.h
diff --git a/src/heap/heap.h b/src/heap/heap.h
index 2628898c8622e4753b4707e5ed07c1d5e1e367db..75267d425503226f0e306d2bde7fd02c6250b25a 100644
--- a/src/heap/heap.h
+++ b/src/heap/heap.h
@@ -1256,8 +1256,8 @@ class Heap {
     return static_cast<intptr_t>(total);
   }
 
-  inline void UpdateNewSpaceAllocationCounter();
-  inline size_t NewSpaceAllocationCounter();
+  V8_INLINE void UpdateNewSpaceAllocationCounter();
+  V8_INLINE size_t NewSpaceAllocationCounter();
 
   // This should be used only for testing.
   void set_new_space_allocation_counter(size_t new_value) {