[Isolates] StaticVisitor::VisitPointer gets Heap* as additional argument

src/spaces.h

Index: src/spaces.h
diff --git a/src/spaces.h b/src/spaces.h
index b41c4d5173dd4e2fb467b961ab254162d8d4cc35..70c447e3fc881b99c70495f58dc78310c3665ca0 100644
--- a/src/spaces.h
+++ b/src/spaces.h
@@ -245,8 +245,11 @@ class Page {
   static const int kPageHeaderSize = kPointerSize + kPointerSize + kIntSize +
     kIntSize + kPointerSize + kPointerSize;
 
-  // The start offset of the object area in a page.
-  static const int kObjectStartOffset = MAP_POINTER_ALIGN(kPageHeaderSize);
+  // The start offset of the object area in a page. Aligned to both maps and
+  // code alignment to be suitabel for both.
+  static const int kObjectStartOffset =
+      CODE_POINTER_ALIGN(MAP_POINTER_ALIGN(kPageHeaderSize));
+
 
   // Object area size in bytes.
   static const int kObjectAreaSize = kPageSize - kObjectStartOffset;