Make concrete classes for individual call descriptors.

src/ic/arm64/access-compiler-arm64.cc

Index: src/ic/arm64/access-compiler-arm64.cc
diff --git a/src/ic/arm64/access-compiler-arm64.cc b/src/ic/arm64/access-compiler-arm64.cc
index ff593b821ac9799b00a8fd54b90e38d8cb001af1..58e6099ae615ce02e1d3b252c0edcd9baaba8054 100644
--- a/src/ic/arm64/access-compiler-arm64.cc
+++ b/src/ic/arm64/access-compiler-arm64.cc
@@ -29,8 +29,8 @@ void PropertyAccessCompiler::GenerateTailCall(MacroAssembler* masm,
 
 Register* PropertyAccessCompiler::load_calling_convention() {
   // receiver, name, scratch1, scratch2, scratch3, scratch4.
-  Register receiver = LoadConvention::ReceiverRegister();
-  Register name = LoadConvention::NameRegister();
+  Register receiver = LoadDescriptor::ReceiverRegister();
+  Register name = LoadDescriptor::NameRegister();
   static Register registers[] = {receiver, name, x3, x0, x4, x5};
   return registers;
 }
@@ -38,9 +38,9 @@ Register* PropertyAccessCompiler::load_calling_convention() {
 
 Register* PropertyAccessCompiler::store_calling_convention() {
   // receiver, value, scratch1, scratch2, scratch3.
-  Register receiver = StoreConvention::ReceiverRegister();
-  Register name = StoreConvention::NameRegister();
-  DCHECK(x3.is(StoreConvention::MapRegister()));
+  Register receiver = StoreDescriptor::ReceiverRegister();
+  Register name = StoreDescriptor::NameRegister();
+  DCHECK(x3.is(ElementTransitionAndStoreDescriptor::MapRegister()));
   static Register registers[] = {receiver, name, x3, x4, x5};
   return registers;
 }