Cleanup interface descriptors to reflect that vectors are part of stores.

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 ece30e7ee46343829cbd5a7ec106dcded484b343..6caf7c5f082033ff5d8a80b79f624be3c6b9df56 100644
--- a/src/x64/interface-descriptors-x64.cc
+++ b/src/x64/interface-descriptors-x64.cc
@@ -31,13 +31,9 @@ const Register LoadWithVectorDescriptor::VectorRegister() { return rbx; }
 const Register StoreDescriptor::ReceiverRegister() { return rdx; }
 const Register StoreDescriptor::NameRegister() { return rcx; }
 const Register StoreDescriptor::ValueRegister() { return rax; }
+const Register StoreDescriptor::SlotRegister() { return rdi; }
 
-
-const Register VectorStoreICTrampolineDescriptor::SlotRegister() { return rdi; }
-
-
-const Register VectorStoreICDescriptor::VectorRegister() { return rbx; }
-
+const Register StoreWithVectorDescriptor::VectorRegister() { return rbx; }
 
 const Register VectorStoreTransitionDescriptor::SlotRegister() { return rdi; }
 const Register VectorStoreTransitionDescriptor::VectorRegister() { return rbx; }