Cleanup unnecessary duplication of runtime functions.

src/arm64/code-stubs-arm64.cc

Index: src/arm64/code-stubs-arm64.cc
diff --git a/src/arm64/code-stubs-arm64.cc b/src/arm64/code-stubs-arm64.cc
index f75539d501501c98976afe7da1c63b8434b8ba43..7d8a4a66e80d1aa8484bff820129ba9bc619acd8 100644
--- a/src/arm64/code-stubs-arm64.cc
+++ b/src/arm64/code-stubs-arm64.cc
@@ -1745,7 +1745,7 @@ void ArgumentsAccessStub::GenerateReadElement(MacroAssembler* masm) {
   // the runtime system.
   __ Bind(&slow);
   __ Push(key);
-  __ TailCallRuntime(Runtime::kGetArgumentsProperty, 1, 1);
+  __ TailCallRuntime(Runtime::kArguments, 1, 1);
 }
 
 
@@ -3695,7 +3695,7 @@ void CompareICStub::GenerateStrings(MacroAssembler* masm) {
   if (equality) {
     __ TailCallRuntime(Runtime::kStringEquals, 2, 1);
   } else {
-    __ TailCallRuntime(Runtime::kStringCompareRT, 2, 1);
+    __ TailCallRuntime(Runtime::kStringCompare, 2, 1);
   }
 
   __ Bind(&miss);
@@ -4024,7 +4024,7 @@ void SubStringStub::Generate(MacroAssembler* masm) {
   __ Ret();
 
   __ Bind(&runtime);
-  __ TailCallRuntime(Runtime::kSubStringRT, 3, 1);
+  __ TailCallRuntime(Runtime::kSubString, 3, 1);
 
   __ bind(&single_char);
   // x1: result_length
@@ -4232,7 +4232,7 @@ void StringCompareStub::Generate(MacroAssembler* masm) {
 
   // Call the runtime.
   // Returns -1 (less), 0 (equal), or 1 (greater) tagged as a small integer.
-  __ TailCallRuntime(Runtime::kStringCompareRT, 2, 1);
+  __ TailCallRuntime(Runtime::kStringCompare, 2, 1);
 }