Use a register spec for StoreIC and KeyedStoreIC.

src/x64/code-stubs-x64.cc

Index: src/x64/code-stubs-x64.cc
diff --git a/src/x64/code-stubs-x64.cc b/src/x64/code-stubs-x64.cc
index 63b1b8fcc86f2bd706972ab809aa9d65a89df0d7..486917fb425052a950bda0e5bfebbe2b43011ef9 100644
--- a/src/x64/code-stubs-x64.cc
+++ b/src/x64/code-stubs-x64.cc
@@ -89,15 +89,6 @@ void RegExpConstructResultStub::InitializeInterfaceDescriptor(
 }
 
 
-void KeyedStoreFastElementStub::InitializeInterfaceDescriptor(
-    CodeStubInterfaceDescriptor* descriptor) {
-  Register registers[] = { rdx, rcx, rax };
-  descriptor->Initialize(
-      ARRAY_SIZE(registers), registers,
-      FUNCTION_ADDR(KeyedStoreIC_MissFromStubFailure));
-}
-
-
 void TransitionElementsKindStub::InitializeInterfaceDescriptor(
     CodeStubInterfaceDescriptor* descriptor) {
   Register registers[] = { rax, rbx };
@@ -231,14 +222,6 @@ void ToBooleanStub::InitializeInterfaceDescriptor(
 }
 
 
-void StoreGlobalStub::InitializeInterfaceDescriptor(
-    CodeStubInterfaceDescriptor* descriptor) {
-  Register registers[] = { rdx, rcx, rax };
-  descriptor->Initialize(ARRAY_SIZE(registers), registers,
-                         FUNCTION_ADDR(StoreIC_MissFromStubFailure));
-}
-
-
 void ElementsTransitionAndStoreStub::InitializeInterfaceDescriptor(
     CodeStubInterfaceDescriptor* descriptor) {
   Register registers[] = { rax, rbx, rcx, rdx };