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/file_dialog_callback_ctocpp.h

@@ -29,16 +29,13 @@ class CefFileDialogCallbackCToCpp
     : public CefCToCpp<CefFileDialogCallbackCToCpp, CefFileDialogCallback,
         cef_file_dialog_callback_t> {
  public:
-  explicit CefFileDialogCallbackCToCpp(cef_file_dialog_callback_t* str)
-      : CefCToCpp<CefFileDialogCallbackCToCpp, CefFileDialogCallback,
-          cef_file_dialog_callback_t>(str) {}
+  CefFileDialogCallbackCToCpp();
 
-  // CefFileDialogCallback methods
-  virtual void Continue(int selected_accept_filter,
+  // CefFileDialogCallback methods.
+  void Continue(int selected_accept_filter,
       const std::vector<CefString>& file_paths) OVERRIDE;
-  virtual void Cancel() OVERRIDE;
+  void Cancel() OVERRIDE;
 };
 
 #endif  // USING_CEF_SHARED
 #endif  // CEF_LIBCEF_DLL_CTOCPP_FILE_DIALOG_CALLBACK_CTOCPP_H_
-