Devirtualize Visitor and remove inline visitor specialization.

third_party/WebKit/Source/platform/heap/HeapPage.cpp

Index: third_party/WebKit/Source/platform/heap/HeapPage.cpp
diff --git a/third_party/WebKit/Source/platform/heap/HeapPage.cpp b/third_party/WebKit/Source/platform/heap/HeapPage.cpp
index cb8f77ef9f12a2499aafa3fbabedbc2a98cde4af..79c74b5f73fd0bf32aafe0507f63a348928d1184 100644
--- a/third_party/WebKit/Source/platform/heap/HeapPage.cpp
+++ b/third_party/WebKit/Source/platform/heap/HeapPage.cpp
@@ -36,7 +36,6 @@
 #include "platform/heap/BlinkGCMemoryDumpProvider.h"
 #include "platform/heap/CallbackStack.h"
 #include "platform/heap/HeapCompact.h"
-#include "platform/heap/MarkingVisitor.h"
 #include "platform/heap/PageMemory.h"
 #include "platform/heap/PagePool.h"
 #include "platform/heap/SafePoint.h"
@@ -1700,13 +1699,28 @@ static void markPointer(Visitor* visitor, HeapObjectHeader* header) {
 }
 
 void NormalPage::checkAndMarkPointer(Visitor* visitor, Address address) {
-  ASSERT(contains(address));
+#if DCHECK_IS_ON()
+  DCHECK(contains(address));
+#endif
   HeapObjectHeader* header = findHeaderFromAddress(address);
   if (!header || header->isDead())
     return;
   markPointer(visitor, header);
 }
 
+#if DCHECK_IS_ON()
+void NormalPage::checkAndMarkPointer(Visitor* visitor,
+                                     Address address,
+                                     MarkedPointerCallbackForTesting callback) {
+  DCHECK(contains(address));
+  HeapObjectHeader* header = findHeaderFromAddress(address);
+  if (!header || header->isDead())
+    return;
+  if (!callback(header))
+    markPointer(visitor, header);
+}
+#endif
+
 void NormalPage::markOrphaned() {
 // Zap the payload with a recognizable value to detect any incorrect
 // cross thread pointer usage.
@@ -1827,12 +1841,27 @@ void LargeObjectPage::poisonUnmarkedObjects() {
 #endif
 
 void LargeObjectPage::checkAndMarkPointer(Visitor* visitor, Address address) {
-  ASSERT(contains(address));
+#if DCHECK_IS_ON()
+  DCHECK(contains(address));
+#endif
   if (!containedInObjectPayload(address) || heapObjectHeader()->isDead())
     return;
   markPointer(visitor, heapObjectHeader());
 }
 
+#if DCHECK_IS_ON()
+void LargeObjectPage::checkAndMarkPointer(
+    Visitor* visitor,
+    Address address,
+    MarkedPointerCallbackForTesting callback) {
+  DCHECK(contains(address));
+  if (!containedInObjectPayload(address) || heapObjectHeader()->isDead())
+    return;
+  if (!callback(heapObjectHeader()))
+    markPointer(visitor, heapObjectHeader());
+}
+#endif
+
 void LargeObjectPage::markOrphaned() {
   // Zap the payload with a recognizable value to detect any incorrect
   // cross thread pointer usage.