Reuse the nonexistent handler frontend for transition handlers

src/arm64/stub-cache-arm64.cc

Index: src/arm64/stub-cache-arm64.cc
diff --git a/src/arm64/stub-cache-arm64.cc b/src/arm64/stub-cache-arm64.cc
index 93352115e95397ec33422c50d56adc3d97407a89..a2dbf728d174d439d73010dc21399077643214bc 100644
--- a/src/arm64/stub-cache-arm64.cc
+++ b/src/arm64/stub-cache-arm64.cc
@@ -368,18 +368,6 @@ 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());
-  }
-}
-
-
 // Generate StoreTransition code, value is passed in x0 register.
 // When leaving generated code after success, the receiver_reg and storage_reg
 // may be clobbered. Upon branch to miss_label, the receiver and name registers
@@ -1102,20 +1090,6 @@ Handle<Code> NamedStoreHandlerCompiler::CompileStoreInterceptor(
 }
 
 
-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(x0, Heap::kUndefinedValueRootIndex);
-  __ Ret();
-
-  // Return the generated code.
-  return GetCode(kind(), Code::FAST, name);
-}
-
-
 // TODO(all): The so-called scratch registers are significant in some cases. For
 // example, PropertyAccessCompiler::keyed_store_calling_convention()[3] (x3) is
 // actually