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/jsdialog_callback_cpptoc.cc

@@ -13,6 +13,8 @@
 #include "libcef_dll/cpptoc/jsdialog_callback_cpptoc.h"
 
 
+namespace {
+
 // MEMBER FUNCTIONS - Body may be edited by hand.
 
 void CEF_CALLBACK jsdialog_callback_cont(struct _cef_jsdialog_callback_t* self,
@@ -30,13 +32,20 @@ void CEF_CALLBACK jsdialog_callback_cont(struct _cef_jsdialog_callback_t* self,
       CefString(user_input));
 }
 
+}  // namespace
+
 
 // CONSTRUCTOR - Do not edit by hand.
 
-CefJSDialogCallbackCppToC::CefJSDialogCallbackCppToC(CefJSDialogCallback* cls)
-    : CefCppToC<CefJSDialogCallbackCppToC, CefJSDialogCallback,
-        cef_jsdialog_callback_t>(cls) {
-  struct_.struct_.cont = jsdialog_callback_cont;
+CefJSDialogCallbackCppToC::CefJSDialogCallbackCppToC() {
+  GetStruct()->cont = jsdialog_callback_cont;
+}
+
+template<> CefRefPtr<CefJSDialogCallback> CefCppToC<CefJSDialogCallbackCppToC,
+    CefJSDialogCallback, cef_jsdialog_callback_t>::UnwrapDerived(
+    CefWrapperType type, cef_jsdialog_callback_t* s) {
+  NOTREACHED() << "Unexpected class type: " << type;
+  return NULL;
 }
 
 #ifndef NDEBUG
@@ -44,3 +53,6 @@ template<> base::AtomicRefCount CefCppToC<CefJSDialogCallbackCppToC,
     CefJSDialogCallback, cef_jsdialog_callback_t>::DebugObjCt = 0;
 #endif
 
+template<> CefWrapperType CefCppToC<CefJSDialogCallbackCppToC,
+    CefJSDialogCallback, cef_jsdialog_callback_t>::kWrapperType =
+    WT_JSDIALOG_CALLBACK;