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/base_cpptoc.cc

@@ -0,0 +1,22 @@
+// Copyright (c) 2015 The Chromium Embedded Framework Authors. All rights
+// reserved. Use of this source code is governed by a BSD-style license that
+// can be found in the LICENSE file.
+
+#include "libcef_dll/cpptoc/base_cpptoc.h"
+
+CefBaseCppToC::CefBaseCppToC() {
+}
+
+template<> CefRefPtr<CefBase> CefCppToC<CefBaseCppToC, CefBase, cef_base_t>::
+    UnwrapDerived(CefWrapperType type, cef_base_t* s) {
+  NOTREACHED();
+  return NULL;
+}
+
+#ifndef NDEBUG
+template<> base::AtomicRefCount CefCppToC<CefBaseCppToC, CefBase,
+    cef_base_t>::DebugObjCt = 0;
+#endif
+
+template<> CefWrapperType CefCppToC<CefBaseCppToC, CefBase,cef_base_t>::
+    kWrapperType = WT_BASE;