Re-land rev. 12849 and 12868 (Heavy cleanup of the external pointer API + related fix).

src/factory.cc

Index: src/factory.cc
diff --git a/src/factory.cc b/src/factory.cc
index a2bb9391ee64fb2bf8fe7332c39353d8fef19999..32a1755e3ba80f81f67974287d65eda8264666ea 100644
--- a/src/factory.cc
+++ b/src/factory.cc
@@ -525,6 +525,12 @@ Handle<FixedArray> Factory::CopyFixedArray(Handle<FixedArray> array) {
 }
 
 
+Handle<FixedArray> Factory::CopySizeFixedArray(Handle<FixedArray> array,
+                                               int new_length) {
+  CALL_HEAP_FUNCTION(isolate(), array->CopySize(new_length), FixedArray);
+}
+
+
 Handle<FixedDoubleArray> Factory::CopyFixedDoubleArray(
     Handle<FixedDoubleArray> array) {
   CALL_HEAP_FUNCTION(isolate(), array->Copy(), FixedDoubleArray);
@@ -870,6 +876,13 @@ Handle<ScopeInfo> Factory::NewScopeInfo(int length) {
 }
 
 
+Handle<JSObject> Factory::NewExternal(void* value) {
+  CALL_HEAP_FUNCTION(isolate(),
+                     isolate()->heap()->AllocateExternal(value),
+                     JSObject);
+}
+
+
 Handle<Code> Factory::NewCode(const CodeDesc& desc,
                               Code::Flags flags,
                               Handle<Object> self_ref,