Core - Use InterlockedCompareExchange for custom ref count reads

CefSharp.Core.Runtime/Internals/CefRefCountManaged.h

@@ -40,15 +40,19 @@ class CefRefCountManaged
     ///
     bool HasOneRef() const
     {
-        return ref_count_ == 1;
+        LONG res = InterlockedCompareExchange(&ref_count_, 0, 0);
+
+        return res == 1;
     }
 
     ///
     // Returns true if the reference count is at least 1.
     ///
     bool HasAtLeastOneRef() const
     {
-        return ref_count_ > 0;
+        LONG res = InterlockedCompareExchange(&ref_count_, 0, 0);
+
+        return res > 0;
     }
 
 private: