[Isolates] Merge crankshaft (r5922 from bleeding_edge).

src/spaces-inl.h

Index: src/spaces-inl.h
diff --git a/src/spaces-inl.h b/src/spaces-inl.h
index 8cad91586dbac90d21a290cc6af7e625cb24ba06..174c634d70d8af2f13ca51dc81c3050b1434d80c 100644
--- a/src/spaces-inl.h
+++ b/src/spaces-inl.h
@@ -465,14 +465,20 @@ MaybeObject* PagedSpace::MCAllocateRaw(int size_in_bytes) {
 // -----------------------------------------------------------------------------
 // LargeObjectChunk
 
-HeapObject* LargeObjectChunk::GetObject() {
+Address LargeObjectChunk::GetStartAddress() {
   // Round the chunk address up to the nearest page-aligned address
   // and return the heap object in that page.
   Page* page = Page::FromAddress(RoundUp(address(), Page::kPageSize));
-  return HeapObject::FromAddress(page->ObjectAreaStart());
+  return page->ObjectAreaStart();
 }
 
 
+void LargeObjectChunk::Free(Executability executable) {
+  Isolate* isolate =
+      Page::FromAddress(RoundUp(address(), Page::kPageSize))->heap_->isolate();
+  isolate->memory_allocator()->FreeRawMemory(address(), size(), executable);
+}
+
 // -----------------------------------------------------------------------------
 // LargeObjectSpace