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/cpptoc/v8stack_trace_cpptoc.h

@@ -28,9 +28,8 @@ class CefV8StackTraceCppToC
     : public CefCppToC<CefV8StackTraceCppToC, CefV8StackTrace,
         cef_v8stack_trace_t> {
  public:
-  explicit CefV8StackTraceCppToC(CefV8StackTrace* cls);
+  CefV8StackTraceCppToC();
 };
 
 #endif  // BUILDING_CEF_SHARED
 #endif  // CEF_LIBCEF_DLL_CPPTOC_V8STACK_TRACE_CPPTOC_H_
-