[Interpreter] Support for operator new.

src/x64/interface-descriptors-x64.cc

Index: src/x64/interface-descriptors-x64.cc
diff --git a/src/x64/interface-descriptors-x64.cc b/src/x64/interface-descriptors-x64.cc
index c323a2d5dba402651aa3b47ffb5ffbe78e520e67..39c8d51f6b6455a0a1a7679af755bdd5c3e3d7a0 100644
--- a/src/x64/interface-descriptors-x64.cc
+++ b/src/x64/interface-descriptors-x64.cc
@@ -395,6 +395,18 @@ void InterpreterPushArgsAndCallDescriptor::InitializePlatformSpecific(
 }
 
 
+void InterpreterPushArgsAndConstructDescriptor::InitializePlatformSpecific(
+    CallInterfaceDescriptorData* data) {
+  Register registers[] = {
+      rax,  // argument count (not including receiver)
+      rdx,  // original constructor
+      rdi,  // constructor
+      rbx,  // address of first argument
+  };
+  data->InitializePlatformSpecific(arraysize(registers), registers);
+}
+
+
 void InterpreterCEntryDescriptor::InitializePlatformSpecific(
     CallInterfaceDescriptorData* data) {
   Register registers[] = {