cppgc: Smaller fixes

Bug: chromium:1056170
Change-Id: Ifa1f8d4c1b1003e9d33f1c9b42e6647388c56d01
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2878746Reviewed-by: Omer Katz <omerkatz@chromium.org>
Commit-Queue: Omer Katz <omerkatz@chromium.org>
Auto-Submit: Michael Lippautz <mlippautz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#74438}

include/cppgc/heap-statistics.h

@@ -57,7 +57,7 @@ struct HeapStatistics final {
   };
 
   /**
-   * Stastistics of the freelist (used only in non-large object spaces). For
+   * Statistics of the freelist (used only in non-large object spaces). For
    * each bucket in the freelist the statistics record the bucket size, the
    * number of freelist entries in the bucket, and the overall allocated memory
    * consumed by these freelist entries.
@@ -67,7 +67,7 @@ struct HeapStatistics final {
     std::vector<size_t> bucket_size;
     /** number of freelist entries per bucket. */
     std::vector<size_t> free_count;
-    /** memory size concumed by freelist entries per size. */
+    /** memory size consumed by freelist entries per size. */
     std::vector<size_t> free_size;
   };
 

src/heap/cppgc/metric-recorder.h

@@ -14,7 +14,7 @@ class StatsCollector;
 
 /**
  * Base class used for reporting GC statistics histograms. Embedders interested
- * in collecting histgorams should implement the virtual AddMainThreadEvent
+ * in collecting histograms should implement the virtual AddMainThreadEvent
  * methods below and pass an instance of the implementation during Heap
  * creation.
  */

src/heap/cppgc/process-heap-statistics.h

@@ -15,7 +15,7 @@ class ProcessHeapStatisticsUpdater {
  public:
   // Allocation observer implementation for heaps should register to contribute
   // to ProcessHeapStatistics. The heap is responsible for allocating and
-  // registering the obsrever impl with its stats collector.
+  // registering the observer impl with its stats collector.
   class AllocationObserverImpl final
       : public StatsCollector::AllocationObserver {
    public:

src/heap/cppgc/stats-collector.h

@@ -256,7 +256,7 @@ class V8_EXPORT_PRIVATE StatsCollector final {
 
   void NotifyAllocation(size_t);
   void NotifyExplicitFree(size_t);
-  // Safepoints should only be invoked when garabge collections are possible.
+  // Safepoints should only be invoked when garbage collections are possible.
   // This is necessary as increments and decrements are reported as close to
   // their actual allocation/reclamation as possible.
   void NotifySafePointForConservativeCollection();

test/unittests/heap/cppgc/persistent-family-unittest.cc

@@ -340,13 +340,13 @@ void NullStateAssignment(cppgc::Heap* heap) {
     PersistentType<GCed> p =
         MakeGarbageCollected<GCed>(heap->GetAllocationHandle());
     EXPECT_EQ(1u, GetRegion<PersistentType>(heap).NodesInUse());
-    p = static_cast<GCed*>(0);
+    p = static_cast<GCed*>(nullptr);
     EXPECT_EQ(nullptr, p.Get());
     EXPECT_EQ(0u, GetRegion<PersistentType>(heap).NodesInUse());
   }
 }
 
-TEST_F(PersistentTest, NullStateAssignemnt) {
+TEST_F(PersistentTest, NullStateAssignment) {
   auto* heap = GetHeap();
   NullStateAssignment<Persistent>(heap);
   NullStateAssignment<WeakPersistent>(heap);