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/run_file_dialog_callback_ctocpp.h

@@ -31,15 +31,12 @@ class CefRunFileDialogCallbackCToCpp
     : public CefCToCpp<CefRunFileDialogCallbackCToCpp, CefRunFileDialogCallback,
         cef_run_file_dialog_callback_t> {
  public:
-  explicit CefRunFileDialogCallbackCToCpp(cef_run_file_dialog_callback_t* str)
-      : CefCToCpp<CefRunFileDialogCallbackCToCpp, CefRunFileDialogCallback,
-          cef_run_file_dialog_callback_t>(str) {}
+  CefRunFileDialogCallbackCToCpp();
 
-  // CefRunFileDialogCallback methods
+  // CefRunFileDialogCallback methods.
   void OnFileDialogDismissed(int selected_accept_filter,
       const std::vector<CefString>& file_paths) override;
 };
 
 #endif  // BUILDING_CEF_SHARED
 #endif  // CEF_LIBCEF_DLL_CTOCPP_RUN_FILE_DIALOG_CALLBACK_CTOCPP_H_
-