Added GlobalCEFApp.DisablePDFExtension property

- Bug fix #89
- New SimpleLazOSRBrowser demo

demos/JavaScript/JSSimpleExtension/uJSSimpleExtension.pas

@@ -94,7 +94,7 @@ type
 var
   JSSimpleExtensionFrm: TJSSimpleExtensionFrm;
 
-procedure GlobalCEFApp_OnWebKitInitializedEvent;
+procedure CreateGlobalCEFApp;
 
 implementation
 
@@ -132,6 +132,12 @@ begin
   CefRegisterExtension('v8/test', TempExtensionCode, nil);
 end;
 
+procedure CreateGlobalCEFApp;
+begin
+  GlobalCEFApp                     := TCefApplication.Create;
+  GlobalCEFApp.OnWebKitInitialized := GlobalCEFApp_OnWebKitInitializedEvent;
+end;
+
 procedure TJSSimpleExtensionFrm.GoBtnClick(Sender: TObject);
 begin
   Chromium1.LoadURL(Edit1.Text);