Cleanup FreeSpace: Remove getter for address of next pointer

BUG=

Review URL: https://codereview.chromium.org/1416003003

Cr-Commit-Position: refs/heads/master@{#31463}

src/heap/objects-visiting.h

@@ -340,7 +340,7 @@ class StaticNewSpaceVisitor : public StaticVisitorBase {
   }
 
   INLINE(static int VisitFreeSpace(Map* map, HeapObject* object)) {
-    return FreeSpace::cast(object)->Size();
+    return FreeSpace::cast(object)->size();
   }
 
   INLINE(static int VisitJSArrayBuffer(Map* map, HeapObject* object));

src/heap/spaces.cc

@@ -2235,7 +2235,7 @@ FreeSpace* FreeListCategory::PickNodeFromList(int* node_size) {
 
   Page* page = Page::FromAddress(node->address());
   while ((node != nullptr) && page->IsEvacuationCandidate()) {
-    available_ -= node->Size();
+    available_ -= node->size();
     page->add_available_in_free_list(type_, -(node->Size()));
     node = node->next();
   }

src/objects-inl.h

@@ -3667,14 +3667,6 @@ FreeSpace* FreeSpace::next() {
 }
 
 
-FreeSpace** FreeSpace::next_address() {
-  DCHECK(map() == GetHeap()->root(Heap::kFreeSpaceMapRootIndex) ||
-         (!GetHeap()->deserialization_complete() && map() == NULL));
-  DCHECK_LE(kNextOffset + kPointerSize, nobarrier_size());
-  return reinterpret_cast<FreeSpace**>(address() + kNextOffset);
-}
-
-
 void FreeSpace::set_next(FreeSpace* next) {
   DCHECK(map() == GetHeap()->root(Heap::kFreeSpaceMapRootIndex) ||
          (!GetHeap()->deserialization_complete() && map() == NULL));

src/objects.cc

@@ -1809,7 +1809,7 @@ void HeapObject::HeapObjectShortPrint(std::ostream& os) {  // NOLINT
       os << "<BytecodeArray[" << BytecodeArray::cast(this)->length() << "]>";
       break;
     case FREE_SPACE_TYPE:
-      os << "<FreeSpace[" << FreeSpace::cast(this)->Size() << "]>";
+      os << "<FreeSpace[" << FreeSpace::cast(this)->size() << "]>";
       break;
 #define TYPED_ARRAY_SHORT_PRINT(Type, type, TYPE, ctype, size)                \
   case FIXED_##TYPE##_ARRAY_TYPE:                                             \

src/objects.h

@@ -4400,7 +4400,6 @@ class FreeSpace: public HeapObject {
 
   // Accessors for the next field.
   inline FreeSpace* next();
-  inline FreeSpace** next_address();
   inline void set_next(FreeSpace* next);
 
   inline static FreeSpace* cast(HeapObject* obj);