Add a UseCounter that measures the amount of memory used in PartitionAlloc

Source/platform/heap/Heap.h

Index: Source/platform/heap/Heap.h
diff --git a/Source/platform/heap/Heap.h b/Source/platform/heap/Heap.h
index 830a19bd69aa9c76d270eea8da03dabe42cb5360..aff253c5129de83312d42db8d762fbda2b159952 100644
--- a/Source/platform/heap/Heap.h
+++ b/Source/platform/heap/Heap.h
@@ -1018,23 +1018,14 @@ public:
     static size_t allocatedObjectSize() { return acquireLoad(&s_allocatedObjectSize); }
     static void increaseMarkedObjectSize(size_t delta) { atomicAdd(&s_markedObjectSize, static_cast<long>(delta)); }
     static size_t markedObjectSize() { return acquireLoad(&s_markedObjectSize); }
-    static void increaseAllocatedSpace(size_t delta)
-    {
-        atomicAdd(&s_allocatedSpace, static_cast<long>(delta));
-        Heap::reportMemoryUsage();
-    }
-    static void decreaseAllocatedSpace(size_t delta)
-    {
-        atomicSubtract(&s_allocatedSpace, static_cast<long>(delta));
-        // We don't need to report memory usage here because we report the usage
-        // only when we see the highest memory usage we've ever seen.
-    }
+    static void increaseAllocatedSpace(size_t delta) { atomicAdd(&s_allocatedSpace, static_cast<long>(delta)); }
+    static void decreaseAllocatedSpace(size_t delta) { atomicSubtract(&s_allocatedSpace, static_cast<long>(delta)); }
     static size_t allocatedSpace() { return acquireLoad(&s_allocatedSpace); }
     static size_t estimatedLiveObjectSize() { return acquireLoad(&s_estimatedLiveObjectSize); }
     static void setEstimatedLiveObjectSize(size_t size) { releaseStore(&s_estimatedLiveObjectSize, size); }
 
     static double estimatedMarkingTime();
-    static void reportMemoryUsage();
+    static void reportMemoryUsageHistogram();
 
     // On object allocation, register the object's externally allocated memory.
     static void increaseExternallyAllocatedBytes(size_t);