Core - WindowInfo: Fixed memory leak (#2670)

Author: merceyz

CefSharp.Core/WindowInfo.h

@@ -14,10 +14,12 @@ namespace CefSharp
     {
     private:
         CefWindowInfo* _windowInfo;
+        bool _ownsPointer = false;
 
     public:
         WindowInfo() : _windowInfo(new CefWindowInfo())
         {
+            _ownsPointer = true;
         }
 
         WindowInfo(CefWindowInfo* windowInfo) : _windowInfo(windowInfo)
@@ -27,6 +29,11 @@ namespace CefSharp
 
         !WindowInfo()
         {
+            if (_ownsPointer)
+            {
+                delete _windowInfo;
+            }
+
             _windowInfo = NULL;
         }