Added GlobalCEFApp.DisablePDFExtension property

- Bug fix #89
- New SimpleLazOSRBrowser demo

demos/JavaScript/JSExtension/JSExtension.dpr

@@ -58,8 +58,9 @@ uses
 {$SetPEFlags IMAGE_FILE_LARGE_ADDRESS_AWARE}
 
 begin
-  GlobalCEFApp                     := TCefApplication.Create;
-  GlobalCEFApp.OnWebKitInitialized := GlobalCEFApp_OnWebKitInitialized;
+  // GlobalCEFApp creation and initialization moved to a different unit to fix the memory leak described in the bug #89
+  // https://github.com/salvadordf/CEF4Delphi/issues/89
+  CreateGlobalCEFApp;
 
   if GlobalCEFApp.StartMainProcess then
     begin
@@ -72,6 +73,5 @@ begin
       Application.Run;
     end;
 
-  GlobalCEFApp.Free;
-  GlobalCEFApp := nil;
+  DestroyGlobalCEFApp;
 end.

demos/JavaScript/JSExtension/uJSExtension.pas

@@ -116,7 +116,7 @@ type
 var
   JSExtensionFrm: TJSExtensionFrm;
 
-procedure GlobalCEFApp_OnWebKitInitialized;
+procedure CreateGlobalCEFApp;
 
 implementation
 
@@ -177,6 +177,12 @@ begin
   CefRegisterExtension('myextension', TempExtensionCode, TempHandler);
 end;
 
+procedure CreateGlobalCEFApp;
+begin
+  GlobalCEFApp                     := TCefApplication.Create;
+  GlobalCEFApp.OnWebKitInitialized := GlobalCEFApp_OnWebKitInitialized;
+end;
+
 procedure TJSExtensionFrm.GoBtnClick(Sender: TObject);
 begin
   Chromium1.LoadURL(Edit1.Text);