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

src/ia32/interface-descriptors-ia32.cc

Index: src/ia32/interface-descriptors-ia32.cc
diff --git a/src/ia32/interface-descriptors-ia32.cc b/src/ia32/interface-descriptors-ia32.cc
index 7c60039a3c41e136713d38c6909183616188ee5f..6a415b26730227040752c0d0398a4934050fe7be 100644
--- a/src/ia32/interface-descriptors-ia32.cc
+++ b/src/ia32/interface-descriptors-ia32.cc
@@ -194,16 +194,15 @@ void CallFunctionWithFeedbackAndVectorDescriptor::InitializePlatformSpecific(
 }
 
 
-void CallConstructDescriptor::InitializePlatformSpecific(
+void ConstructDescriptor::InitializePlatformSpecific(
     CallInterfaceDescriptorData* data) {
   // eax : number of arguments
   // ebx : feedback vector
-  // ecx : new target (for IsSuperConstructorCall)
   // edx : slot in feedback vector (Smi, for RecordCallTarget)
   // edi : constructor function
   // 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[] = {eax, edi, ecx, ebx};
+  Register registers[] = {eax, edi, edx, ebx};
   data->InitializePlatformSpecific(arraysize(registers), registers, NULL);
 }