[heap] Add a flag to disable remembered set verification.

src/heap/spaces.cc

Index: src/heap/spaces.cc
diff --git a/src/heap/spaces.cc b/src/heap/spaces.cc
index 8f75e14b788cac4e31459caed1cc58243f0280fd..71e1b60be978ec3d23a7d4081a46b626f586fa16 100644
--- a/src/heap/spaces.cc
+++ b/src/heap/spaces.cc
@@ -1569,7 +1569,9 @@ void PagedSpace::Verify(ObjectVisitor* visitor) {
       // The object itself should look OK.
       object->ObjectVerify();
 
-      heap()->VerifyRememberedSetFor(object);
+      if (!FLAG_verify_heap_skip_remembered_set) {
+        heap()->VerifyRememberedSetFor(object);
+      }
 
       // All the interior pointers should be contained in the heap.
       int size = object->Size();
@@ -3323,7 +3325,9 @@ void LargeObjectSpace::Verify() {
     // The object itself should look OK.
     object->ObjectVerify();
 
-    heap()->VerifyRememberedSetFor(object);
+    if (!FLAG_verify_heap_skip_remembered_set) {
+      heap()->VerifyRememberedSetFor(object);
+    }
 
     // Byte arrays and strings don't have interior pointers.
     if (object->IsAbstractCode()) {