[builtins] Sanitize the machinery around Construct calls.

src/arm/interface-descriptors-arm.cc

Index: src/arm/interface-descriptors-arm.cc
diff --git a/src/arm/interface-descriptors-arm.cc b/src/arm/interface-descriptors-arm.cc
index e5415daf0568ee1a1f930c599a9be120b9ccc1ad..627f75b56e53a0a128334985f0070e5d53b9f713 100644
--- a/src/arm/interface-descriptors-arm.cc
+++ b/src/arm/interface-descriptors-arm.cc
@@ -206,6 +206,16 @@ void CallTrampolineDescriptor::InitializePlatformSpecific(
 }
 
 
+void ConstructTrampolineDescriptor::InitializePlatformSpecific(
+    CallInterfaceDescriptorData* data) {
+  // r0 : number of arguments
+  // r1 : the target to call
+  // r3 : the new target
+  Register registers[] = {r1, r3, r0};
+  data->InitializePlatformSpecific(arraysize(registers), registers);
+}
+
+
 void RegExpConstructResultDescriptor::InitializePlatformSpecific(
     CallInterfaceDescriptorData* data) {
   Register registers[] = {r2, r1, r0};