Fix clang build: remove unused static function

src/runtime.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 949 matching lines @@
   Object* V = args[1];
   while (true) {
     Object* prototype = V->GetPrototype();
     if (prototype->IsNull()) return isolate->heap()->false_value();
     if (O == prototype) return isolate->heap()->true_value();
     V = prototype;
   }
 }
 
 
-// Recursively traverses hidden prototypes if property is not found
-static void GetOwnPropertyImplementation(JSObject* obj,
-                                         String* name,
-                                         LookupResult* result) {
-  obj->LocalLookupRealNamedProperty(name, result);
-
-  if (result->IsFound()) return;
-
-  Object* proto = obj->GetPrototype();
-  if (proto->IsJSObject() &&
-      JSObject::cast(proto)->map()->is_hidden_prototype()) {
-    GetOwnPropertyImplementation(JSObject::cast(proto),
-                                 name, result);
-  }
-}
-
-
 static bool CheckAccessException(Object* callback,
                                  v8::AccessType access_type) {
   if (callback->IsAccessorInfo()) {
     AccessorInfo* info = AccessorInfo::cast(callback);
     return
         (access_type == v8::ACCESS_HAS &&
            (info->all_can_read() || info->all_can_write())) ||
         (access_type == v8::ACCESS_GET && info->all_can_read()) ||
         (access_type == v8::ACCESS_SET && info->all_can_write());
   }
@@ skipping 12320 matching lines @@
     // Handle last resort GC and make sure to allow future allocations
     // to grow the heap without causing GCs (if possible).
     isolate->counters()->gc_last_resort_from_js()->Increment();
     isolate->heap()->CollectAllGarbage(Heap::kNoGCFlags,
                                        "Runtime::PerformGC");
   }
 }
 
 
 } }  // namespace v8::internal