Reuse the nonexistent handler frontend for transition handlers

src/x64/stub-cache-x64.cc

Index: src/x64/stub-cache-x64.cc
diff --git a/src/x64/stub-cache-x64.cc b/src/x64/stub-cache-x64.cc
index b0cc929e89484d72163086bdba9f0b07e3e399f4..a73efdfc6b78a0626e368992fd81bb9f718b3ef1 100644
--- a/src/x64/stub-cache-x64.cc
+++ b/src/x64/stub-cache-x64.cc
@@ -367,18 +367,6 @@ void NamedStoreHandlerCompiler::GenerateRestoreName(Label* label,
 }
 
 
-void NamedStoreHandlerCompiler::GenerateNegativeHolderLookup(
-    Register holder_reg, Handle<Name> name, Label* miss) {
-  if (holder()->IsJSGlobalObject()) {
-    GenerateCheckPropertyCell(masm(), Handle<JSGlobalObject>::cast(holder()),
-                              name, scratch1(), miss);
-  } else if (!holder()->HasFastProperties()) {
-    GenerateDictionaryNegativeLookup(masm(), miss, holder_reg, name, scratch1(),
-                                     scratch2());
-  }
-}
-
-
 // Receiver_reg is preserved on jumps to miss_label, but may be destroyed if
 // store is successful.
 void NamedStoreHandlerCompiler::GenerateStoreTransition(
@@ -1081,20 +1069,6 @@ Handle<Code> PropertyICCompiler::CompileKeyedStorePolymorphic(
 }
 
 
-Handle<Code> NamedLoadHandlerCompiler::CompileLoadNonexistent(
-    Handle<Name> name) {
-  NonexistentFrontend(name);
-
-  // Return undefined if maps of the full prototype chain are still the
-  // same and no global property with this name contains a value.
-  __ LoadRoot(rax, Heap::kUndefinedValueRootIndex);
-  __ ret(0);
-
-  // Return the generated code.
-  return GetCode(kind(), Code::FAST, name);
-}
-
-
 Register* PropertyAccessCompiler::load_calling_convention() {
   // receiver, name, scratch1, scratch2, scratch3, scratch4.
   Register receiver = LoadIC::ReceiverRegister();