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/task_ctocpp.h

@@ -27,13 +27,11 @@
 class CefTaskCToCpp
     : public CefCToCpp<CefTaskCToCpp, CefTask, cef_task_t> {
  public:
-  explicit CefTaskCToCpp(cef_task_t* str)
-      : CefCToCpp<CefTaskCToCpp, CefTask, cef_task_t>(str) {}
+  CefTaskCToCpp();
 
-  // CefTask methods
+  // CefTask methods.
   void Execute() override;
 };
 
 #endif  // BUILDING_CEF_SHARED
 #endif  // CEF_LIBCEF_DLL_CTOCPP_TASK_CTOCPP_H_
-