Provide call counts for constructor calls, surface them as a vector IC.

src/arm64/interface-descriptors-arm64.cc

Index: src/arm64/interface-descriptors-arm64.cc
diff --git a/src/arm64/interface-descriptors-arm64.cc b/src/arm64/interface-descriptors-arm64.cc
index 39db443504b46ba6741e6aaf1213c0b2561331b5..3123b6a50d29227d0f0722d2530e785d63a5116a 100644
--- a/src/arm64/interface-descriptors-arm64.cc
+++ b/src/arm64/interface-descriptors-arm64.cc
@@ -209,16 +209,15 @@ void CallFunctionWithFeedbackAndVectorDescriptor::InitializePlatformSpecific(
 }
 
 
-void CallConstructDescriptor::InitializePlatformSpecific(
+void ConstructDescriptor::InitializePlatformSpecific(
     CallInterfaceDescriptorData* data) {
   // x0 : number of arguments
   // x1 : the function to call
   // x2 : feedback vector
   // x3 : slot in feedback vector (Smi, for RecordCallTarget)
-  // x4 : new target (for IsSuperConstructorCall)
   // TODO(turbofan): So far we don't gather type feedback and hence skip the
   // slot parameter, but ArrayConstructStub needs the vector to be undefined.
-  Register registers[] = {x0, x1, x4, x2};
+  Register registers[] = {x0, x1, x3, x3};
   data->InitializePlatformSpecific(arraysize(registers), registers);
 }