Merge "Add WRTWindow and WRTWebContents" into tizen

diff --cc wrt_app/src/web_application.js
index b6729c4,ec85403..77e9f63
--- 1/wrt_app/src/web_application.js
--- 2/wrt_app/src/web_application.js
+++ b/wrt_app/src/web_application.js
@@@ -170,11 -167,9 +172,11 @@@ class WebApplication 
              }
          });
      }
-     getBrowserWindowOption(options) {
+     getWindowOption(options) {
          return {
              fullscreen: false,
 +            backgroundColor: this.defaultBackgroundColor,
 +            transparent: this.defaultTransparent,
              show: false,
              webPreferences: {
                  nodeIntegration: options.isAddonAvailable,