Improve inheritance support in the CEF API (issue #1623).

- Support single parent inheritance in CEF API classes.
- Support non-virtual inheritance in CEF API classes.
- Support translation of CEF API sub-directories.
- Add test sub-directories for testing-only functionality that will be
  available to unit tests but not exposed via the binary distribution.
- Add unit tests for the translator tool.
- Fix parsing of template parameter types that include commas.

libcef_dll/ctocpp/jsdialog_handler_ctocpp.h

@@ -28,11 +28,9 @@ class CefJSDialogHandlerCToCpp
     : public CefCToCpp<CefJSDialogHandlerCToCpp, CefJSDialogHandler,
         cef_jsdialog_handler_t> {
  public:
-  explicit CefJSDialogHandlerCToCpp(cef_jsdialog_handler_t* str)
-      : CefCToCpp<CefJSDialogHandlerCToCpp, CefJSDialogHandler,
-          cef_jsdialog_handler_t>(str) {}
+  CefJSDialogHandlerCToCpp();
 
-  // CefJSDialogHandler methods
+  // CefJSDialogHandler methods.
   bool OnJSDialog(CefRefPtr<CefBrowser> browser, const CefString& origin_url,
       const CefString& accept_lang, JSDialogType dialog_type,
       const CefString& message_text, const CefString& default_prompt_text,
@@ -47,4 +45,3 @@ class CefJSDialogHandlerCToCpp
 
 #endif  // BUILDING_CEF_SHARED
 #endif  // CEF_LIBCEF_DLL_CTOCPP_JSDIALOG_HANDLER_CTOCPP_H_
-