Cleanup unused Dart API Dart_IdentityHash

runtime/vm/dart_api_impl.cc

 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "include/dart_api.h"
 #include "include/dart_mirrors_api.h"
 #include "include/dart_native_api.h"
 
 #include "lib/stacktrace.h"
 #include "platform/assert.h"
@@ skipping 897 matching lines @@
     }
   }
   const Object& object1 = Object::Handle(Z, Api::UnwrapHandle(obj1));
   const Object& object2 = Object::Handle(Z, Api::UnwrapHandle(obj2));
   if (object1.IsInstance() && object2.IsInstance()) {
     return Instance::Cast(object1).IsIdenticalTo(Instance::Cast(object2));
   }
   return false;
 }
 
-DART_EXPORT uint64_t Dart_IdentityHash(Dart_Handle obj) {
-  DARTSCOPE(Thread::Current());
-
-  const Object& object = Object::Handle(Z, Api::UnwrapHandle(obj));
-  if (!object.IsInstance() && !object.IsNull()) {
-    return 0;
-  }
-
-  const Library& libcore = Library::Handle(Z, Library::CoreLibrary());
-  const String& function_name =
-      String::Handle(Z, String::New("identityHashCode"));
-  const Function& function =
-      Function::Handle(Z, libcore.LookupFunctionAllowPrivate(function_name));
-  if (function.IsNull()) {
-    UNREACHABLE();
-    return 0;
-  }
-
-  const Array& arguments = Array::Handle(Z, Array::New(1));
-  arguments.SetAt(0, object);
-  const Object& result =
-      Object::Handle(Z, DartEntry::InvokeFunction(function, arguments));
-
-  if (result.IsSmi()) {
-    return Smi::Cast(result).Value();
-  }
-  if (result.IsMint()) {
-    const Mint& mint = Mint::Cast(result);
-    if (!mint.IsNegative()) {
-      return mint.AsInt64Value();
-    }
-  }
-  if (result.IsBigint()) {
-    const Bigint& bigint = Bigint::Cast(result);
-    if (bigint.FitsIntoUint64()) {
-      return bigint.AsUint64Value();
-    }
-  }
-  return 0;
-}
-
 DART_EXPORT Dart_Handle
 Dart_HandleFromPersistent(Dart_PersistentHandle object) {
   Thread* thread = Thread::Current();
   Isolate* isolate = thread->isolate();
   CHECK_ISOLATE(isolate);
   NoSafepointScope no_safepoint_scope;
   ApiState* state = isolate->api_state();
   ASSERT(state != NULL);
   PersistentHandle* ref = PersistentHandle::Cast(object);
   return Api::NewHandle(thread, ref->raw());
@@ skipping 5728 matching lines @@
 #endif
 }
 
 DART_EXPORT void Dart_DumpNativeStackTrace(void* context) {
 #ifndef PRODUCT
   Profiler::DumpStackTrace(context);
 #endif
 }
 
 }  // namespace dart