Add GetIdentityHash to v8::Name object API

src/api.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/api.h"
 
 #include <string.h>  // For memcpy, strlen.
 #ifdef V8_USE_ADDRESS_SANITIZER
 #include <sanitizer/asan_interface.h>
 #endif  // V8_USE_ADDRESS_SANITIZER
@@ skipping 4213 matching lines @@
   }
   i::Handle<i::FixedArray> bound_args = i::Handle<i::FixedArray>(
       i::FixedArray::cast(func->function_bindings()));
   i::Handle<i::Object> original(
       bound_args->get(i::JSFunction::kBoundFunctionIndex),
       func->GetIsolate());
   return Utils::ToLocal(i::Handle<i::JSFunction>::cast(original));
 }
 
 
+int Name::GetIdentityHash() {
+  i::Isolate* isolate = Utils::OpenHandle(this)->GetIsolate();
+  ON_BAILOUT(isolate, "v8::Name::GetIdentityHash()", return 0);
+  ENTER_V8(isolate);
+  i::HandleScope scope(isolate);
+  i::Handle<i::Name> self = Utils::OpenHandle(this);
+  return static_cast<int>(self->Hash());
+}
+
+
 int String::Length() const {
   i::Handle<i::String> str = Utils::OpenHandle(this);
   return str->length();
 }
 
 
 bool String::IsOneByte() const {
   i::Handle<i::String> str = Utils::OpenHandle(this);
   return str->HasOnlyOneByteChars();
 }
@@ skipping 3443 matching lines @@
   Isolate* isolate = reinterpret_cast<Isolate*>(info.GetIsolate());
   Address callback_address =
       reinterpret_cast<Address>(reinterpret_cast<intptr_t>(callback));
   VMState<EXTERNAL> state(isolate);
   ExternalCallbackScope call_scope(isolate, callback_address);
   callback(info);
 }
 
 
 } }  // namespace v8::internal