A64: Synchronize with r17104.

src/handles.cc

Index: src/handles.cc
diff --git a/src/handles.cc b/src/handles.cc
index 6b9025dbf6306da14897b1e4656e45e7bb2aebf0..20fe116dde996afe8fd1a8b8ff4ce89c82c9cd76 100644
--- a/src/handles.cc
+++ b/src/handles.cc
@@ -101,7 +101,7 @@ void HandleScope::DeleteExtensions(Isolate* isolate) {
 }
 
 
-#ifdef ENABLE_EXTRA_CHECKS
+#ifdef ENABLE_HANDLE_ZAPPING
 void HandleScope::ZapRange(Object** start, Object** end) {
   ASSERT(end - start <= kHandleBlockSize);
   for (Object** p = start; p != end; p++) {
@@ -881,4 +881,15 @@ DeferredHandles* DeferredHandleScope::Detach() {
 }
 
 
+void AddWeakObjectToCodeDependency(Heap* heap,
+                                   Handle<Object> object,
+                                   Handle<Code> code) {
+  heap->EnsureWeakObjectToCodeTable();
+  Handle<DependentCode> dep(heap->LookupWeakObjectToCodeDependency(*object));
+  dep = DependentCode::Insert(dep, DependentCode::kWeaklyEmbeddedGroup, code);
+  CALL_HEAP_FUNCTION_VOID(heap->isolate(),
+                          heap->AddWeakObjectToCodeDependency(*object, *dep));
+}
+
+
 } }  // namespace v8::internal