Reverting r4703.

src/globals.h

Index: src/globals.h
===================================================================
--- src/globals.h	(revision 4703)
+++ src/globals.h	(working copy)
@@ -303,6 +303,7 @@
 class IC;
 class InterceptorInfo;
 class IterationStatement;
+class Array;
 class JSArray;
 class JSFunction;
 class JSObject;
@@ -543,16 +544,16 @@
 #define HAS_FAILURE_TAG(value) \
   ((reinterpret_cast<intptr_t>(value) & kFailureTagMask) == kFailureTag)
 
-// OBJECT_POINTER_ALIGN returns the value aligned as a HeapObject pointer
-#define OBJECT_POINTER_ALIGN(value)                             \
+// OBJECT_SIZE_ALIGN returns the value aligned HeapObject size
+#define OBJECT_SIZE_ALIGN(value)                                \
   (((value) + kObjectAlignmentMask) & ~kObjectAlignmentMask)
 
 // POINTER_SIZE_ALIGN returns the value aligned as a pointer.
 #define POINTER_SIZE_ALIGN(value)                               \
   (((value) + kPointerAlignmentMask) & ~kPointerAlignmentMask)
 
-// MAP_POINTER_ALIGN returns the value aligned as a map pointer.
-#define MAP_POINTER_ALIGN(value)                                \
+// MAP_SIZE_ALIGN returns the value aligned as a map pointer.
+#define MAP_SIZE_ALIGN(value)                               \
   (((value) + kMapAlignmentMask) & ~kMapAlignmentMask)
 
 // The expression OFFSET_OF(type, field) computes the byte-offset