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/jsdialog_callback_ctocpp.cc

@@ -17,7 +17,8 @@
 
 void CefJSDialogCallbackCToCpp::Continue(bool success,
     const CefString& user_input) {
-  if (CEF_MEMBER_MISSING(struct_, cont))
+  cef_jsdialog_callback_t* _struct = GetStruct();
+  if (CEF_MEMBER_MISSING(_struct, cont))
     return;
 
   // AUTO-GENERATED CONTENT - DELETE THIS COMMENT BEFORE MODIFYING
@@ -25,14 +26,29 @@ void CefJSDialogCallbackCToCpp::Continue(bool success,
   // Unverified params: user_input
 
   // Execute
-  struct_->cont(struct_,
+  _struct->cont(_struct,
       success,
       user_input.GetStruct());
 }
 
 
+// CONSTRUCTOR - Do not edit by hand.
+
+CefJSDialogCallbackCToCpp::CefJSDialogCallbackCToCpp() {
+}
+
+template<> cef_jsdialog_callback_t* CefCToCpp<CefJSDialogCallbackCToCpp,
+    CefJSDialogCallback, cef_jsdialog_callback_t>::UnwrapDerived(
+    CefWrapperType type, CefJSDialogCallback* c) {
+  NOTREACHED() << "Unexpected class type: " << type;
+  return NULL;
+}
+
 #ifndef NDEBUG
 template<> base::AtomicRefCount CefCToCpp<CefJSDialogCallbackCToCpp,
     CefJSDialogCallback, cef_jsdialog_callback_t>::DebugObjCt = 0;
 #endif
 
+template<> CefWrapperType CefCToCpp<CefJSDialogCallbackCToCpp,
+    CefJSDialogCallback, cef_jsdialog_callback_t>::kWrapperType =
+    WT_JSDIALOG_CALLBACK;