Fixes in string handling and CEF types

- Modified Cefv8Accessor and Cefv8Interceptor helper function declarations.
- Fixed and renamed ICefV8Interceptor parameters.
- Fixed and renamed ICefV8Accessor parameters.
- Modified ICefValue.SetBool parameter.
- Fixed ICefMenuModelDelegate.FormatLabel "label" parameter.
- Modified CefStringClearAndGet parameter.
- Added CefStringInitialize function.
- Fixed string handling in TCefRequestContextRef.SetPreference.
- Fixed string handling in TCefCustomResourceBundleHandler.GetLocalizedString.
- Fixed string handling in TCefResourceHandlerOwn.GetResponseHeaders.
- Fixed string handling in TCefResourceRequestHandlerOwn.OnResourceRedirect.
- Fixed string handling in TCefStringMapOwn.
- Fixed string handling in TCefStringMultimapOwn.
- Fixed and renamed ICefv8Handler.Execute parameters.
- Adapted JSWindowBindingWithObject demo to new Cefv8Accessor declaration.

demos/Delphi_VCL/JavaScript/JSWindowBindingWithObject/uJSWindowBindingWithObject.pas

@@ -50,7 +50,7 @@ uses
   Controls, Forms, Dialogs, StdCtrls, ExtCtrls, ComCtrls,
   {$ENDIF}
   uCEFChromium, uCEFWindowParent, uCEFInterfaces, uCEFApplication, uCEFTypes, uCEFConstants,
-  uCEFWinControl, uCEFSentinel;
+  uCEFWinControl, uCEFSentinel, uCEFChromiumCore;
 
 type
   TJSWindowBindingWithObjectFrm = class(TForm)