Oilpan: Replace checkHeader() with ASSERT(checkHeader())

Source/platform/heap/TraceTraits.h

Index: Source/platform/heap/TraceTraits.h
diff --git a/Source/platform/heap/TraceTraits.h b/Source/platform/heap/TraceTraits.h
index a73f4c2b53cb89d429d1c4d49329da8d7d140f40..2c5b3ebfb28366fc7781f86cf80b710ce91522fc 100644
--- a/Source/platform/heap/TraceTraits.h
+++ b/Source/platform/heap/TraceTraits.h
@@ -371,7 +371,7 @@ struct TraceInCollectionTrait<NoWeakHandlingInCollections, strongify, blink::Hea
 
         T* array = reinterpret_cast<T*>(self);
         blink::HeapObjectHeader* header = blink::HeapObjectHeader::fromPayload(self);
-        header->checkHeader();
+        ASSERT(header->checkHeader());
         // Use the payload size as recorded by the heap to determine how many
         // elements to trace.
         size_t length = header->payloadSize() / sizeof(T);
@@ -407,7 +407,7 @@ struct TraceInCollectionTrait<NoWeakHandlingInCollections, strongify, blink::Hea
 
         Value* array = reinterpret_cast<Value*>(self);
         blink::HeapObjectHeader* header = blink::HeapObjectHeader::fromPayload(self);
-        header->checkHeader();
+        ASSERT(header->checkHeader());
         // Use the payload size as recorded by the heap to determine how many
         // elements to trace.
         size_t length = header->payloadSize() / sizeof(Value);
@@ -434,7 +434,7 @@ struct TraceInCollectionTrait<NoWeakHandlingInCollections, strongify, blink::Hea
     {
         Node** array = reinterpret_cast<Node**>(self);
         blink::HeapObjectHeader* header = blink::HeapObjectHeader::fromPayload(self);
-        header->checkHeader();
+        ASSERT(header->checkHeader());
         size_t length = header->payloadSize() / sizeof(Node*);
         for (size_t i = 0; i < length; ++i) {
             if (!HashTableHelper<Node*, typename Table::ExtractorType, typename Table::KeyTraitsType>::isEmptyOrDeletedBucket(array[i])) {