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/render_process_handler_ctocpp.h

@@ -28,11 +28,9 @@ class CefRenderProcessHandlerCToCpp
     : public CefCToCpp<CefRenderProcessHandlerCToCpp, CefRenderProcessHandler,
         cef_render_process_handler_t> {
  public:
-  explicit CefRenderProcessHandlerCToCpp(cef_render_process_handler_t* str)
-      : CefCToCpp<CefRenderProcessHandlerCToCpp, CefRenderProcessHandler,
-          cef_render_process_handler_t>(str) {}
+  CefRenderProcessHandlerCToCpp();
 
-  // CefRenderProcessHandler methods
+  // CefRenderProcessHandler methods.
   void OnRenderThreadCreated(CefRefPtr<CefListValue> extra_info) override;
   void OnWebKitInitialized() override;
   void OnBrowserCreated(CefRefPtr<CefBrowser> browser) override;
@@ -58,4 +56,3 @@ class CefRenderProcessHandlerCToCpp
 
 #endif  // BUILDING_CEF_SHARED
 #endif  // CEF_LIBCEF_DLL_CTOCPP_RENDER_PROCESS_HANDLER_CTOCPP_H_
-